{
  "test_case_id": "A11Y-MOTION-005",
  "title": "Parallax, zoom and vestibular motion",
  "category": "reduced_motion",
  "procedure_version": "2026.08.27-rc.9",
  "rule_type": "atomic",
  "wcag_criteria": [],
  "level": "advisory",
  "risk": "low",
  "risk_basis": "Checks parallax, zoom and vestibular motion under the actual operating-system preference. People most likely affected: people with vestibular disorders, motion sensitivity, attention-related disabilities or seizure disorders. Motion may cause symptoms, distract from the task or remove functionality when reduction is requested. In the recorded reduced-motion-os-browser environment, compare the default and reduced-motion experiences, including transitions, parallax and animated status changes; motion may remain harmful even when its duration is short.",
  "review_status": "draft",
  "reviewed_at": "",
  "review_note": "Template content is subject to a hash-bound internal consistency review. Formal assessment claims require competent execution, current evidence and the applicable legal, participant and organisational authority.",
  "method_label": "Motion-preference check",
  "tester_level": "General QA tester",
  "estimated_duration": "Typically 43–62 minutes for the stated single-target assumptions; use the component breakdown when estimating a real sample.",
  "execution_class": "manual_with_automation_support",
  "automation_support": "supporting_evidence_only",
  "simulation_policy": "simulation_may_support_but_not_replace_manual_execution",
  "plain_summary": "Checks parallax, zoom and vestibular motion under the actual operating-system preference.",
  "objective": "Verify parallax, zoom and vestibular motion under the actual operating-system preference.",
  "test_subject": "The frozen experience with the operating-system reduced-motion preference in the stated initial or runtime state.",
  "test_targets": [
    "Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion."
  ],
  "applicability": "Apply Parallax, zoom and vestibular motion when the frozen experience with the operating-system reduced-motion preference in the stated initial or runtime state. The selected focus is Parallax, zoom and vestibular motion.",
  "applicability_questions": [
    "Does the frozen scope contain a target relevant to Parallax, zoom and vestibular motion?",
    "Are the required real environments, versions and settings identified separately from diagnostic simulations?",
    "Which default, revealed, error, interruption, recovery and confirmation states can change the result?",
    "Does a scope exclusion need to be reported separately from target applicability?"
  ],
  "inapplicability_conditions": [
    "The frozen scope contains no motion, animation or state relevant to Parallax, zoom and vestibular motion."
  ],
  "assumptions": [
    "The selected scope identifies the product version, technologies, states and important user journeys being evaluated.",
    "The tester knows how to use this method and any required assistive technology.",
    "Known browser or assistive-technology limitations are recorded instead of being assigned to the product without evidence."
  ],
  "accessibility_support_assumptions": [
    "The result covers only the browsers, platforms, readers and assistive technologies that were actually tested.",
    "Do not apply a result from one technology combination to an untested combination or to every user."
  ],
  "prerequisites": [
    "The product area and test targets are agreed before testing starts.",
    "The operating system, browser, viewport and input method are recorded.",
    "Test data is safe to use and does not expose unnecessary personal information."
  ],
  "required_environment_fields": [
    "operating_system",
    "operating_system_version",
    "browser",
    "browser_version",
    "viewport_css_pixels",
    "input_method",
    "reduced_motion_setting"
  ],
  "steps": [
    {
      "step_id": "S1",
      "title": "Prepare the scope, target and environment",
      "phase": "prepare",
      "test_target": "Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion.",
      "required_state": "For Parallax, zoom and vestibular motion, the product version and scope are frozen; every selected target and material starting state is uniquely identified.",
      "tool_or_command": "Use the scope record and worksheet environment fields for Parallax, zoom and vestibular motion: operating_system, operating_system_version, browser, browser_version, viewport_css_pixels, input_method, reduced_motion_setting.",
      "action": "Before executing Parallax, zoom and vestibular motion, freeze the product version and scope. Inventory each applicable target, select the required starting states, prepare safe test data and record every required environment value. Complete any named known-good calibration before attributing an observation to the product.",
      "expected": "The selected targets, states, test data, environment and any scope limitations are complete enough for another qualified tester to reproduce the setup.",
      "failure_observation": "During Parallax, zoom and vestibular motion, the target, starting state, environment or scope record remains ambiguous for the scenario named Prepare the scope, target and environment. The preparation result cannot be demonstrated: The selected targets, states, test data, environment and any scope limitations are complete enough for another qualified tester to reproduce the setup.",
      "evidence_to_record": "Scope/version reference; target inventory; starting states; safe-data reference; every required environment value; calibration result or reason it is not required.",
      "decision_effect": "For Parallax, zoom and vestibular motion, an incomplete setup blocks the affected execution or leaves the omitted target untested; it never creates a pass or product failure.",
      "recovery_or_repeat": "For Parallax, zoom and vestibular motion, correct the setup gap, preserve the original blocked record and start a new execution observation before proceeding.",
      "novice_guidance": "For Parallax, zoom and vestibular motion, do not begin from an undocumented browser tab, document copy, device state, participant plan or evidence set. Record the exact item you will test first.",
      "limitations_and_claim_boundary": "This scenario records the action named Prepare the scope, target and environment for Parallax, zoom and vestibular motion in reduced-motion-os-browser. It does not establish behaviour for another target, state or environment and does not set a WCAG conformance decision.",
      "scenario_purpose": "For Parallax, zoom and vestibular motion, prepare the named scenario: Prepare the scope, target and environment. Target: Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion. The preparation must establish this result: The selected targets, states, test data, environment and any scope limitations are complete enough for another qualified tester to reproduce the setup.",
      "user_impact": "Motion may cause symptoms, distract from the task or remove functionality when reduction is requested. This scenario isolates that risk in the action named Prepare the scope, target and environment.",
      "decision_rules": {
        "passed": "Record passed for the Parallax, zoom and vestibular motion scenario named Prepare the scope, target and environment only when the evidence (Scope/version reference; target inventory; starting states; safe-data reference; every required environment value; calibration result or reason it is not required.) supports: The selected targets, states, test data, environment and any scope limitations are complete enough for another qualified tester to reproduce the setup.",
        "failed": "Record failed when the action is completed and this failure observation is reproduced: During Parallax, zoom and vestibular motion, the target, starting state, environment or scope record remains ambiguous for the scenario named Prepare the scope, target and environment. The preparation result cannot be demonstrated: The selected targets, states, test data, environment and any scope limitations are complete enough for another qualified tester to reproduce the setup.",
        "not_applicable": "The frozen scope contains no motion, animation or state relevant to Parallax, zoom and vestibular motion.",
        "blocked": "Record blocked, not passed, when An applicable target, required state, complete process or named real environment was not executed."
      }
    },
    {
      "step_id": "S2",
      "title": "Record OS, browser, OS motion preference and application state",
      "phase": "test",
      "action": "Record OS, browser, OS motion preference and application state; disable DevTools emulation for the primary result.",
      "expected": "The actual user preference and baseline are reproducible.",
      "evidence_to_record": "Before/after recording or frame/timing evidence for the exact motion and task state.",
      "test_target": "Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion.",
      "required_state": "For Parallax, zoom and vestibular motion, begin in the recorded default state for the selected Parallax, zoom and vestibular motion target before this action; preserve the exact content, account, platform and configuration used.",
      "tool_or_command": "In reduced-motion-os-browser, Change the operating-system reduced-motion preference, start or reload the product as required, and compare the same action with the preference off and on. A CSS media-query inspector is diagnostic only.",
      "decision_effect": "For Parallax, zoom and vestibular motion, compare the recorded observation with this expected result: The actual user preference and baseline are reproducible. A material mismatch fails this target expectation; conflicting platform or responsibility evidence is cannot tell, not a pass.",
      "recovery_or_repeat": "Repeat this action for every required variation of Parallax, zoom and vestibular motion and after a material target, content, state, environment or configuration change. Preserve the original observation.",
      "novice_guidance": "For Parallax, zoom and vestibular motion: Record whether reduced motion was active before launch and whether the product also has its own motion setting. Observe the complete transition, not a single screenshot.",
      "scenario_purpose": "For Parallax, zoom and vestibular motion, execute the named scenario: Record OS, browser, OS motion preference and application state. Target: Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion. Compare the observation with this result: The actual user preference and baseline are reproducible.",
      "user_impact": "Motion may cause symptoms, distract from the task or remove functionality when reduction is requested. This scenario isolates that risk in the action named Record OS, browser, OS motion preference and application state.",
      "failure_observation": "After the tester completes the Parallax, zoom and vestibular motion scenario named Record OS, browser, OS motion preference and application state, the recorded observation for the target is inconsistent with the required result: The actual user preference and baseline are reproducible.",
      "decision_rules": {
        "passed": "Record passed for the Parallax, zoom and vestibular motion scenario named Record OS, browser, OS motion preference and application state only when the evidence (Before/after recording or frame/timing evidence for the exact motion and task state.) supports: The actual user preference and baseline are reproducible.",
        "failed": "Record failed when the action is completed and this failure observation is reproduced: After the tester completes the Parallax, zoom and vestibular motion scenario named Record OS, browser, OS motion preference and application state, the recorded observation for the target is inconsistent with the required result: The actual user preference and baseline are reproducible.",
        "not_applicable": "The frozen scope contains no motion, animation or state relevant to Parallax, zoom and vestibular motion.",
        "blocked": "Record blocked, not passed, when An applicable target, required state, complete process or named real environment was not executed."
      },
      "limitations_and_claim_boundary": "This scenario records the action named Record OS, browser, OS motion preference and application state for Parallax, zoom and vestibular motion in reduced-motion-os-browser. It does not establish behaviour for another target, state or environment and does not set a WCAG conformance decision."
    },
    {
      "step_id": "S3",
      "title": "Exercise scrolling, carousels, background video, parallax, large scaling and panning",
      "phase": "test",
      "action": "Exercise scrolling, carousels, background video, parallax, large scaling and panning; repeat with reduced motion and keyboard navigation.",
      "expected": "Potential vestibular triggers are absent, user-controlled or replaced with a non-motion equivalent when reduction is requested.",
      "evidence_to_record": "Before/after recording or frame/timing evidence for the exact motion and task state.",
      "test_target": "Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion.",
      "required_state": "For Parallax, zoom and vestibular motion, begin in the recorded task position immediately before the interruption, with recoverable input already entered; preserve the exact content, account, platform and configuration used.",
      "tool_or_command": "In reduced-motion-os-browser, Change the operating-system reduced-motion preference, start or reload the product as required, and compare the same action with the preference off and on. A CSS media-query inspector is diagnostic only.",
      "decision_effect": "For Parallax, zoom and vestibular motion, compare the recorded observation with this expected result: Potential vestibular triggers are absent, user-controlled or replaced with a non-motion equivalent when reduction is requested. A material mismatch fails this target expectation; conflicting platform or responsibility evidence is cannot tell, not a pass.",
      "recovery_or_repeat": "Repeat this action for every required variation of Parallax, zoom and vestibular motion and after a material target, content, state, environment or configuration change. Preserve the original observation.",
      "novice_guidance": "For Parallax, zoom and vestibular motion: Record whether reduced motion was active before launch and whether the product also has its own motion setting. Observe the complete transition, not a single screenshot.",
      "scenario_purpose": "For Parallax, zoom and vestibular motion, execute the named scenario: Exercise scrolling, carousels, background video, parallax, large scaling and panning. Target: Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion. Compare the observation with this result: Potential vestibular triggers are absent, user-controlled or replaced with a non-motion equivalent when reduction is requested.",
      "user_impact": "Motion may cause symptoms, distract from the task or remove functionality when reduction is requested. This scenario isolates that risk in the action named Exercise scrolling, carousels, background video, parallax, large scaling and panning.",
      "failure_observation": "After the tester completes the Parallax, zoom and vestibular motion scenario named Exercise scrolling, carousels, background video, parallax, large scaling and panning, the recorded observation for the target is inconsistent with the required result: Potential vestibular triggers are absent, user-controlled or replaced with a non-motion equivalent when reduction is requested.",
      "decision_rules": {
        "passed": "Record passed for the Parallax, zoom and vestibular motion scenario named Exercise scrolling, carousels, background video, parallax, large scaling and panning only when the evidence (Before/after recording or frame/timing evidence for the exact motion and task state.) supports: Potential vestibular triggers are absent, user-controlled or replaced with a non-motion equivalent when reduction is requested.",
        "failed": "Record failed when the action is completed and this failure observation is reproduced: After the tester completes the Parallax, zoom and vestibular motion scenario named Exercise scrolling, carousels, background video, parallax, large scaling and panning, the recorded observation for the target is inconsistent with the required result: Potential vestibular triggers are absent, user-controlled or replaced with a non-motion equivalent when reduction is requested.",
        "not_applicable": "The frozen scope contains no motion, animation or state relevant to Parallax, zoom and vestibular motion.",
        "blocked": "Record blocked, not passed, when An applicable target, required state, complete process or named real environment was not executed."
      },
      "limitations_and_claim_boundary": "This scenario records the action named Exercise scrolling, carousels, background video, parallax, large scaling and panning for Parallax, zoom and vestibular motion in reduced-motion-os-browser. It does not establish behaviour for another target, state or environment and does not set a WCAG conformance decision."
    },
    {
      "step_id": "S4",
      "title": "Complete the same critical journey with no preference and with reduction requested",
      "phase": "test",
      "action": "Complete the same critical journey with no preference and with reduction requested; compare functionality, focus and status communication.",
      "expected": "Reduced motion does not remove information, focus feedback or completion status.",
      "evidence_to_record": "Before/after recording or frame/timing evidence for the exact motion and task state.",
      "test_target": "Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion.",
      "required_state": "For Parallax, zoom and vestibular motion, begin in keyboard focus on the last confirmed target before the action, with no pointer assistance; preserve the exact content, account, platform and configuration used.",
      "tool_or_command": "In reduced-motion-os-browser, Change the operating-system reduced-motion preference, start or reload the product as required, and compare the same action with the preference off and on. A CSS media-query inspector is diagnostic only.",
      "decision_effect": "For Parallax, zoom and vestibular motion, compare the recorded observation with this expected result: Reduced motion does not remove information, focus feedback or completion status. A material mismatch fails this target expectation; conflicting platform or responsibility evidence is cannot tell, not a pass.",
      "recovery_or_repeat": "Repeat this action for every required variation of Parallax, zoom and vestibular motion and after a material target, content, state, environment or configuration change. Preserve the original observation.",
      "novice_guidance": "For Parallax, zoom and vestibular motion: Record whether reduced motion was active before launch and whether the product also has its own motion setting. Observe the complete transition, not a single screenshot.",
      "scenario_purpose": "For Parallax, zoom and vestibular motion, execute the named scenario: Complete the same critical journey with no preference and with reduction requested. Target: Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion. Compare the observation with this result: Reduced motion does not remove information, focus feedback or completion status.",
      "user_impact": "Motion may cause symptoms, distract from the task or remove functionality when reduction is requested. This scenario isolates that risk in the action named Complete the same critical journey with no preference and with reduction requested.",
      "failure_observation": "After the tester completes the Parallax, zoom and vestibular motion scenario named Complete the same critical journey with no preference and with reduction requested, the recorded observation for the target is inconsistent with the required result: Reduced motion does not remove information, focus feedback or completion status.",
      "decision_rules": {
        "passed": "Record passed for the Parallax, zoom and vestibular motion scenario named Complete the same critical journey with no preference and with reduction requested only when the evidence (Before/after recording or frame/timing evidence for the exact motion and task state.) supports: Reduced motion does not remove information, focus feedback or completion status.",
        "failed": "Record failed when the action is completed and this failure observation is reproduced: After the tester completes the Parallax, zoom and vestibular motion scenario named Complete the same critical journey with no preference and with reduction requested, the recorded observation for the target is inconsistent with the required result: Reduced motion does not remove information, focus feedback or completion status.",
        "not_applicable": "The frozen scope contains no motion, animation or state relevant to Parallax, zoom and vestibular motion.",
        "blocked": "Record blocked, not passed, when An applicable target, required state, complete process or named real environment was not executed."
      },
      "limitations_and_claim_boundary": "This scenario records the action named Complete the same critical journey with no preference and with reduction requested for Parallax, zoom and vestibular motion in reduced-motion-os-browser. It does not establish behaviour for another target, state or environment and does not set a WCAG conformance decision."
    },
    {
      "step_id": "S5",
      "title": "Attach before/after recordings or frame evidence and document any essential-motion claim",
      "phase": "test",
      "action": "Attach before/after recordings or frame evidence and document any essential-motion claim.",
      "expected": "Evidence demonstrates the material difference and any exception is reviewable.",
      "evidence_to_record": "Before/after recording or frame/timing evidence for the exact motion and task state.",
      "test_target": "Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion.",
      "required_state": "For Parallax, zoom and vestibular motion, begin in the recorded default state for the selected Parallax, zoom and vestibular motion target before this action; preserve the exact content, account, platform and configuration used.",
      "tool_or_command": "In reduced-motion-os-browser, Change the operating-system reduced-motion preference, start or reload the product as required, and compare the same action with the preference off and on. A CSS media-query inspector is diagnostic only.",
      "decision_effect": "For Parallax, zoom and vestibular motion, compare the recorded observation with this expected result: Evidence demonstrates the material difference and any exception is reviewable. A material mismatch fails this target expectation; conflicting platform or responsibility evidence is cannot tell, not a pass.",
      "recovery_or_repeat": "Repeat this action for every required variation of Parallax, zoom and vestibular motion and after a material target, content, state, environment or configuration change. Preserve the original observation.",
      "novice_guidance": "For Parallax, zoom and vestibular motion: Record whether reduced motion was active before launch and whether the product also has its own motion setting. Observe the complete transition, not a single screenshot.",
      "scenario_purpose": "For Parallax, zoom and vestibular motion, execute the named scenario: Attach before/after recordings or frame evidence and document any essential-motion claim. Target: Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion. Compare the observation with this result: Evidence demonstrates the material difference and any exception is reviewable.",
      "user_impact": "Motion may cause symptoms, distract from the task or remove functionality when reduction is requested. This scenario isolates that risk in the action named Attach before/after recordings or frame evidence and document any essential-motion claim.",
      "failure_observation": "After the tester completes the Parallax, zoom and vestibular motion scenario named Attach before/after recordings or frame evidence and document any essential-motion claim, the recorded observation for the target is inconsistent with the required result: Evidence demonstrates the material difference and any exception is reviewable.",
      "decision_rules": {
        "passed": "Record passed for the Parallax, zoom and vestibular motion scenario named Attach before/after recordings or frame evidence and document any essential-motion claim only when the evidence (Before/after recording or frame/timing evidence for the exact motion and task state.) supports: Evidence demonstrates the material difference and any exception is reviewable.",
        "failed": "Record failed when the action is completed and this failure observation is reproduced: After the tester completes the Parallax, zoom and vestibular motion scenario named Attach before/after recordings or frame evidence and document any essential-motion claim, the recorded observation for the target is inconsistent with the required result: Evidence demonstrates the material difference and any exception is reviewable.",
        "not_applicable": "The frozen scope contains no motion, animation or state relevant to Parallax, zoom and vestibular motion.",
        "blocked": "Record blocked, not passed, when An applicable target, required state, complete process or named real environment was not executed."
      },
      "limitations_and_claim_boundary": "This scenario records the action named Attach before/after recordings or frame evidence and document any essential-motion claim for Parallax, zoom and vestibular motion in reduced-motion-os-browser. It does not establish behaviour for another target, state or environment and does not set a WCAG conformance decision."
    },
    {
      "step_id": "S6",
      "title": "Repeat material variations and recovery",
      "phase": "test",
      "test_target": "Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion.",
      "required_state": "For Parallax, zoom and vestibular motion: Default, revealed, loading, empty, validation error, interruption, recovery and confirmation where meaningful. Every required environment, viewport, orientation, language and authenticated state recorded in the frozen scope.",
      "tool_or_command": "For Parallax, zoom and vestibular motion, use the same recorded method, then change only the state, environment or recovery condition being compared.",
      "action": "Repeat the Parallax, zoom and vestibular motion action for each inventoried variation that can change the outcome. Include relevant default, revealed, error, interruption, recovery and confirmation states and complete the selected process from start to finish where this test can affect task completion.",
      "expected": "Every material variation and required recovery path has its own reproducible observation; no unexecuted state is merged into a passing result.",
      "failure_observation": "After the tester completes the Parallax, zoom and vestibular motion scenario named Repeat material variations and recovery, the recorded observation for the target is inconsistent with the required result: Every material variation and required recovery path has its own reproducible observation; no unexecuted state is merged into a passing result.",
      "evidence_to_record": "Variation identifier; changed state or environment; start and end points; actual observation; recovery result; intervention; evidence reference and target outcome.",
      "decision_effect": "For Parallax, zoom and vestibular motion, a reproduced mismatch fails the affected target; an omitted required variation remains untested; conflicting evidence remains cannot tell.",
      "recovery_or_repeat": "Repeat this action for every required variation of Parallax, zoom and vestibular motion and after a material target, content, state, environment or configuration change. Preserve the original observation.",
      "novice_guidance": "For Parallax, zoom and vestibular motion, change one material condition at a time where practical. Do not assume that a passing default state covers errors, overlays, orientation changes, interruptions or recovery.",
      "limitations_and_claim_boundary": "This scenario records the action named Repeat material variations and recovery for Parallax, zoom and vestibular motion in reduced-motion-os-browser. It does not establish behaviour for another target, state or environment and does not set a WCAG conformance decision.",
      "scenario_purpose": "For Parallax, zoom and vestibular motion, execute the named scenario: Repeat material variations and recovery. Target: Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion. Compare the observation with this result: Every material variation and required recovery path has its own reproducible observation; no unexecuted state is merged into a passing result.",
      "user_impact": "Motion may cause symptoms, distract from the task or remove functionality when reduction is requested. This scenario isolates that risk in the action named Repeat material variations and recovery.",
      "decision_rules": {
        "passed": "Record passed for the Parallax, zoom and vestibular motion scenario named Repeat material variations and recovery only when the evidence (Variation identifier; changed state or environment; start and end points; actual observation; recovery result; intervention; evidence reference and target outcome.) supports: Every material variation and required recovery path has its own reproducible observation; no unexecuted state is merged into a passing result.",
        "failed": "Record failed when the action is completed and this failure observation is reproduced: After the tester completes the Parallax, zoom and vestibular motion scenario named Repeat material variations and recovery, the recorded observation for the target is inconsistent with the required result: Every material variation and required recovery path has its own reproducible observation; no unexecuted state is merged into a passing result.",
        "not_applicable": "The frozen scope contains no motion, animation or state relevant to Parallax, zoom and vestibular motion.",
        "blocked": "Record blocked, not passed, when An applicable target, required state, complete process or named real environment was not executed."
      }
    }
  ],
  "expectations": [
    {
      "expectation_id": "E1",
      "statement": "Potential vestibular triggers are absent, user-controlled or replaced with a non-motion equivalent when reduction is requested.",
      "outcome_if_unmet": "failed"
    }
  ],
  "exceptions": [
    "Use only an exception stated in the relevant standard, or an agreed out-of-scope decision. Record the reason and evidence.",
    "A tool limitation, lack of time or unavailable assistive technology is a limitation or incomplete result, not a pass."
  ],
  "outcome_definitions": {
    "passed": "The applicable test target meets every expectation in this rule or procedure.",
    "failed": "The applicable test target does not meet at least one expectation in this rule or procedure.",
    "inapplicable": "The test subject contains no target that matches this rule or procedure's applicability.",
    "cantTell": "The tester cannot fully determine applicability or whether every expectation is met.",
    "untested": "The test subject or target was not evaluated using this rule or procedure."
  },
  "examples": [
    {
      "example_id": "A11Y-MOTION-005-EX-PASSED",
      "outcome": "passed",
      "scenario": "Representative calibration example, not client evidence. Procedure: Parallax, zoom and vestibular motion. Target: Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion. Action: Before executing Parallax, zoom and vestibular motion, freeze the product version and scope. Inventory each applicable target, select the required starting states, prepare safe test data and record every required environment value. Complete any named known-good calibration before attributing an observation to the product. Evidence: Scope/version reference; target inventory; starting states; safe-data reference; every required environment value; calibration result or reason it is not required. Observed result: The selected targets, states, test data, environment and any scope limitations are complete enough for another qualified tester to reproduce the setup."
    },
    {
      "example_id": "A11Y-MOTION-005-EX-FAILED",
      "outcome": "failed",
      "scenario": "Representative calibration example, not client evidence. Procedure: Parallax, zoom and vestibular motion. Target: Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion. The tester completes the recorded action, but the captured evidence does not demonstrate: The selected targets, states, test data, environment and any scope limitations are complete enough for another qualified tester to reproduce the setup. The failed target and state remain separate from unexecuted targets."
    },
    {
      "example_id": "A11Y-MOTION-005-EX-INAPPLICABLE",
      "outcome": "inapplicable",
      "scenario": "Representative scope example, not client evidence. The frozen scope contains no motion, animation or state relevant to Parallax, zoom and vestibular motion. The completed inventory is retained as the basis for the inapplicable outcome."
    },
    {
      "example_id": "A11Y-MOTION-005-EX-CANTTELL",
      "outcome": "cantTell",
      "scenario": "Representative unresolved example, not client evidence. The target is applicable, but conflicting evidence or unresolved responsibility prevents a defensible expectation decision after recorded comparison. The record identifies the conflicting evidence and the expertise or comparison needed to resolve it."
    },
    {
      "example_id": "A11Y-MOTION-005-EX-UNTESTED",
      "outcome": "untested",
      "scenario": "Representative execution-gap example, not client evidence. An applicable target, required state, complete process or named real environment was not executed. The missing action, state or environment remains open and is not converted to a pass."
    }
  ],
  "sampling_rule": "Test every in-scope instance when practical. For a large population, document a sample that includes each template, content or control type, meaningful state and high-risk task.",
  "complete_process_requirement": "If this check is part of a user journey, test the selected journey from start to finish, including relevant errors and recovery. Record any path that was not tested.",
  "pass_criteria": "Potential vestibular triggers are absent, user-controlled or replaced with a non-motion equivalent when reduction is requested.",
  "fail_criteria": "Fail if any applicable sampled instance does not satisfy: Potential vestibular triggers are absent, user-controlled or replaced with a non-motion equivalent when reduction is requested.",
  "evidence_requirements": [
    "Operating system, browser, motion preference, application setting and whether the preference was active before load.",
    "Before/after recording or frame/timing evidence for the exact motion and task state.",
    "Essential-motion rationale, source and the smallest target to which it applies."
  ],
  "official_source_ids": [
    "W3C-WCAG22",
    "W3C-REDUCED-MOTION",
    "MICROSOFT-EDGE-A11Y"
  ],
  "act_rule_mapping": {
    "format_alignment": "This is a project-authored manual procedure, not a W3C Approved ACT Rule.",
    "approved_rule_ids": [],
    "approved_rules": [],
    "mapping_status": "No supporting ACT rule selected",
    "registry_reviewed_at": "2026-08-27",
    "registry_source_id": "W3C-ACT-RULES",
    "mapping_rationale": "An ACT result can support only the part of this procedure covered by that rule. It does not replace the remaining manual or assistive-technology checks."
  },
  "technique_traceability": [],
  "platform_ids": [
    "reduced-motion-os-browser"
  ],
  "review_requirement": "A qualified accessibility reviewer must confirm the scope, evidence and result before it is reported as final.",
  "known_issues": [
    "Check relevant browser, tool or assistive-technology release notes before assigning unexpected behaviour to the product.",
    "If responsibility is unclear, record the reproducible behaviour and use cannot tell until it is resolved."
  ],
  "change_log": [
    {
      "version": "2026.08.27-rc.9",
      "change": "Reworked for plain language, case-focused steps, scoped evidence and transparent draft review status."
    },
    {
      "version": "2026.08.27-rc.9",
      "change": "Case-specific specialist content, evidence and platform boundaries completed for hash-bound agent verification."
    },
    {
      "version": "2026.08.27-rc.9",
      "change": "Removed administrative filler steps, added contextual risk and result boundaries, and prepared the concise worksheet flow for internal consistency review."
    }
  ],
  "tags": [
    "motion",
    "reduced_motion",
    "vestibular"
  ],
  "status": "draft",
  "authoring_readiness": "content_complete",
  "short_title": "Parallax, zoom and vestibular motion",
  "catalogue_version": "2026.08.27-rc.9",
  "identity": {
    "stable_case_id": "A11Y-MOTION-005",
    "procedure_title": "Parallax, zoom and vestibular motion",
    "short_user_centred_title": "Parallax, zoom and vestibular motion",
    "procedure_version": "2026.08.27-rc.9",
    "catalogue_version": "2026.08.27-rc.9",
    "status": "draft",
    "category": "reduced_motion",
    "procedure_type": "atomic",
    "execution_class": "manual_with_automation_support",
    "intended_tester_expertise": "General QA tester",
    "effort_model": {
      "model": "component_effort_v2",
      "small_scope_minutes": {
        "minimum": 43,
        "maximum": 62
      },
      "warning": "Add a new per-target execution and evidence allowance for each additional target class or state that could produce a different result. Add setup time for each distinct environment.",
      "calculation_guidance": "Add the recorded setup, per-target execution, evidence and technical-review components; then apply the stated variation rule.",
      "unit": "minutes",
      "setup": {
        "typical": 12,
        "includes": "Confirm scope and target, prepare safe data, establish the required state and record the tool or environment version."
      },
      "per_target_execution": {
        "typical": 15,
        "includes": "Perform the procedure once for one target in its selected states; this excludes remediation and retesting."
      },
      "evidence_capture": {
        "typical": 8,
        "includes": "Capture, name and cross-reference the minimum reproducible evidence while removing unnecessary personal or secret data."
      },
      "technical_review": {
        "typical": 8,
        "includes": "Check applicability, observations, outcome logic, evidence sufficiency and report wording before issue publication."
      },
      "typical_total_range": {
        "minimum": 43,
        "maximum": 62
      },
      "assumptions": "one page with one motion preference and representative triggers; repeat for distinct animation mechanisms",
      "variation": "Add a new per-target execution and evidence allowance for each additional target class or state that could produce a different result. Add setup time for each distinct environment.",
      "excludes": "Client coordination, inaccessible-environment recovery, recruitment, legal review, remediation implementation and waiting time unless the procedure states otherwise."
    },
    "related_procedures": [],
    "replaces": [],
    "replaced_by": []
  },
  "purpose_and_user_impact": {
    "barrier_detected": "Checks parallax, zoom and vestibular motion under the actual operating-system preference.",
    "people_likely_affected": [
      "People with vestibular disorders, motion sensitivity, attention-related disabilities or seizure disorders."
    ],
    "functionality_or_information_at_risk": "Motion may cause symptoms, distract from the task or remove functionality when reduction is requested.",
    "result_scope": "platform_interoperability",
    "claim_boundary": "This procedure determines whether Parallax, zoom and vestibular motion meets its stated expectations for the recorded targets and reduced-motion-os-browser. Unexecuted targets, states and environments remain outside that result.",
    "why_it_matters": "Motion may cause symptoms, distract from the task or remove functionality when reduction is requested. The procedure is necessary because checks parallax, zoom and vestibular motion under the actual operating-system preference and the result can otherwise conceal a material barrier for the affected people named here."
  },
  "requirement_mappings": [
    {
      "source_id": "W3C-REDUCED-MOTION",
      "requirement_id": "W3C-REDUCED-MOTION",
      "requirement_level": "informative",
      "requirement_type": "advisory",
      "coverage_type": "supporting",
      "canonical_source": "https://www.w3.org/TR/mediaqueries-5/#prefers-reduced-motion",
      "source_status": "draft_note",
      "source_version_or_publication_date": "Media Queries Level 5; W3C Working Draft 19 February 2026",
      "date_verified": "2026-08-27",
      "reviewer_notes": "Supporting source. Procedure-level content review remains recorded separately.",
      "limitations": "This source does not override WCAG or create an additional WCAG conformance requirement.",
      "dependent_fields": [
        "prerequisites",
        "environment",
        "steps"
      ]
    },
    {
      "source_id": "MICROSOFT-EDGE-A11Y",
      "requirement_id": "MICROSOFT-EDGE-A11Y",
      "requirement_level": "informative",
      "requirement_type": "advisory",
      "coverage_type": "supporting",
      "canonical_source": "https://learn.microsoft.com/en-us/microsoft-edge/devtools/accessibility/reference",
      "source_status": "vendor_guidance",
      "source_version_or_publication_date": "Current first-party publication; exact version pending source review",
      "date_verified": "2026-08-27",
      "reviewer_notes": "Supporting source. Procedure-level content review remains recorded separately.",
      "limitations": "This source does not override WCAG or create an additional WCAG conformance requirement.",
      "dependent_fields": [
        "prerequisites",
        "environment",
        "steps"
      ]
    }
  ],
  "applicability_model": {
    "test_subject": "The frozen experience with the operating-system reduced-motion preference in the stated initial or runtime state.",
    "test_targets": [
      "Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion."
    ],
    "objective_questions": [
      "Does the frozen scope contain a target relevant to Parallax, zoom and vestibular motion?",
      "Are the required real environments, versions and settings identified separately from diagnostic simulations?",
      "Which default, revealed, error, interruption, recovery and confirmation states can change the result?",
      "Does a scope exclusion need to be reported separately from target applicability?"
    ],
    "subjective_judgements": [
      "Record any judgement about meaning, equivalence, task success, platform responsibility or exception use with evidence for independent review."
    ],
    "inapplicability_conditions": [
      "The frozen scope contains no motion, animation or state relevant to Parallax, zoom and vestibular motion."
    ],
    "scope_exclusions": [
      "An agreed exclusion is a reporting limitation, not an inapplicable target and not a pass."
    ],
    "required_states_and_variations": [
      "Default, revealed, loading, empty, validation error, interruption, recovery and confirmation where meaningful.",
      "Every required environment, viewport, orientation, language and authenticated state recorded in the frozen scope."
    ],
    "complete_process_dependencies": "Run each selected critical process from its defined start through success, at least one representative error, interruption and recovery, and confirmation where the focus can affect task completion.",
    "conforming_alternate_version_considerations": "A conforming alternate version can affect a WCAG report only when all WCAG conformance conditions are verified separately. It does not erase a platform or usability observation."
  },
  "normative_exceptions": [],
  "normative_exceptions_absent_reason": "This platform, journey, usability or quality procedure creates no additional normative exception. Apply exceptions only in the linked atomic or criterion-level conformance procedure and preserve that separate decision.",
  "environment": {
    "required_tester_expertise": "General QA tester",
    "required_platforms": [
      "reduced-motion-os-browser"
    ],
    "minimum_environment_fields": [
      "operating_system",
      "operating_system_version",
      "browser",
      "browser_version",
      "viewport_css_pixels",
      "input_method",
      "reduced_motion_setting"
    ],
    "product_and_content_version_required": true,
    "viewport_and_orientation_required": true,
    "input_mode_required": true,
    "relevant_settings": [
      "Operating-system motion preference",
      "Browser version",
      "Application motion setting",
      "Autoplay setting"
    ],
    "known_platform_limitations": [
      "A reduced-motion preference is a platform signal, not proof that every user needs the same presentation or that every motion requirement is satisfied.",
      "Check relevant browser, tool or assistive-technology release notes before assigning unexpected behaviour to the product.",
      "If responsibility is unclear, record the reproducible behaviour and use cannot tell until it is resolved."
    ],
    "clean_state_requirements": [
      "Complete a known-good calibration in the same environment before product testing.",
      "Start from a recorded clean or known state and preserve any prior preferences, extensions, cache or profile settings that can affect output."
    ],
    "test_data_and_privacy_constraints": [
      "Use authorised synthetic or controlled data.",
      "Do not record credentials, secrets or unnecessary personal data."
    ],
    "coverage_boundary": "A reduced-motion preference is a platform signal, not proof that every user needs the same presentation or that every motion requirement is satisfied."
  },
  "decision_logic": {
    "target_passed": "Potential vestibular triggers are absent, user-controlled or replaced with a non-motion equivalent when reduction is requested.",
    "target_failed": "An applicable Parallax, zoom and vestibular motion target has a reproducible material barrier against one or more stated expectations; identify the exact expectation, state and evidence.",
    "target_inapplicable": "The frozen scope contains no motion, animation or state relevant to Parallax, zoom and vestibular motion.",
    "target_cant_tell": "The target is applicable, but conflicting evidence or unresolved responsibility prevents a defensible expectation decision after recorded comparison.",
    "target_untested": "An applicable target, required state, complete process or named real environment was not executed.",
    "aggregation": "Preserve every target/environment outcome. Any failed target prevents an overall passed procedure result. cantTell and untested remain unresolved; inapplicable is valid only when the completed inventory contains no applicable target.",
    "wcag_requirement_decision": "This specialist, platform, document, usability or quality result does not set a WCAG success criterion to satisfied or not_satisfied automatically. Use linked atomic and criterion-level procedures for that separate decision.",
    "conforming_alternate_version_effect": "Record alternate-version evidence separately. It does not erase a barrier in this tested version or environment.",
    "passed_automation_follow_up": "A checker, accessibility-tree inspection, emulator or simulated assistive technology is diagnostic evidence only. Complete every required manual, real-platform, contextual and exception check.",
    "platform_responsibility": "Compare the product with a known-good control and an authorised alternate environment. Record product defect, external limitation or unresolved responsibility only when evidence supports it; otherwise use cantTell.",
    "claim_readiness": "Schema validation or a passed target never creates a conformance or release claim. Required executions, a distinct competent review, limitations and any applicable legal, participant or organisational authority remain separate gates."
  },
  "evidence_specification": [
    {
      "evidence_id": "EV1",
      "method": "environment_record",
      "record": "Operating system, browser, motion preference, application setting and whether the preference was active before load.",
      "review_purpose": "Allow an independent reviewer to reproduce the target, environment, action, actual behaviour and decision.",
      "privacy_and_security": "Reference or redact sensitive material. Do not store credentials, secrets, unnecessary personal data or unconsented participant data.",
      "required_for_formal_result": true
    },
    {
      "evidence_id": "EV2",
      "method": "motion_comparison",
      "record": "Before/after recording or frame/timing evidence for the exact motion and task state.",
      "review_purpose": "Allow an independent reviewer to reproduce the target, environment, action, actual behaviour and decision.",
      "privacy_and_security": "Reference or redact sensitive material. Do not store credentials, secrets, unnecessary personal data or unconsented participant data.",
      "required_for_formal_result": true
    },
    {
      "evidence_id": "EV3",
      "method": "exception_record",
      "record": "Essential-motion rationale, source and the smallest target to which it applies.",
      "review_purpose": "Allow an independent reviewer to reproduce the target, environment, action, actual behaviour and decision.",
      "privacy_and_security": "Reference or redact sensitive material. Do not store credentials, secrets, unnecessary personal data or unconsented participant data.",
      "required_for_formal_result": true
    }
  ],
  "calibration_examples": [
    {
      "example_id": "A11Y-MOTION-005-EX-PASS",
      "outcome": "passed",
      "scenario": "In reduced-motion-os-browser, the selected Parallax, zoom and vestibular motion target completes the recorded action and meets this expectation: Potential vestibular triggers are absent, user-controlled or replaced with a non-motion equivalent when reduction is requested.",
      "explanation": "The example is a calibration scenario, not an execution or approval.",
      "fixture_id": "",
      "fixture_version": "",
      "machine_testable": false
    },
    {
      "example_id": "A11Y-MOTION-005-EX-FAIL",
      "outcome": "failed",
      "scenario": "An applicable Parallax, zoom and vestibular motion target produces a reproducible barrier during the named action, with the exact state and affected user task recorded.",
      "explanation": "A failed target remains failed even if another environment or target passes.",
      "fixture_id": "",
      "fixture_version": "",
      "machine_testable": false
    },
    {
      "example_id": "A11Y-MOTION-005-EX-INAPPLICABLE",
      "outcome": "inapplicable",
      "scenario": "The frozen scope contains no motion, animation or state relevant to Parallax, zoom and vestibular motion.",
      "explanation": "Inapplicable requires a completed inventory showing that no target matches applicability; a missing environment is not inapplicable.",
      "fixture_id": "",
      "fixture_version": "",
      "machine_testable": false
    },
    {
      "example_id": "A11Y-MOTION-005-EX-CANTTELL",
      "outcome": "cantTell",
      "scenario": "The Parallax, zoom and vestibular motion target is applicable, but conflicting product/platform evidence or missing authoritative information prevents a defensible responsibility or expectation decision.",
      "explanation": "Record the conflict, comparisons attempted and person or evidence needed to resolve it.",
      "fixture_id": "",
      "fixture_version": "",
      "machine_testable": false
    },
    {
      "example_id": "A11Y-MOTION-005-EX-UNTESTED",
      "outcome": "untested",
      "scenario": "The Parallax, zoom and vestibular motion target is applicable, but a required state, complete process or real environment was not executed.",
      "explanation": "Untested remains incomplete and cannot be converted to passed or inapplicable.",
      "fixture_id": "",
      "fixture_version": "",
      "machine_testable": false
    }
  ],
  "review_record": {
    "author": "",
    "method_reviewer": "",
    "independent_standards_reviewer": "",
    "accessibility_ui_reviewer": "",
    "author_date": "",
    "method_review_date": "",
    "standards_review_date": "",
    "ui_review_date": "",
    "source_versions_reviewed": [],
    "exceptions_reviewed": false,
    "known_limitations": [
      "A reduced-motion preference is a platform signal, not proof that every user needs the same presentation or that every motion requirement is satisfied.",
      "Real execution evidence and any customer-required legal, participant or organisational authority remain separate."
    ],
    "open_issues": [
      "Execute all required real environments and calibration cases.",
      "Complete a distinct competent review and retain any unresolved material finding as blocked or cantTell."
    ],
    "decision": "pending",
    "next_review_date": "",
    "status_transition_reason": "",
    "release_gate_id": "",
    "release_gate_completed_at": "",
    "approval_authority": "",
    "approval_date": ""
  },
  "privacy_and_security": {
    "browser_storage": "Worksheet data is stored only in this browser's local storage until the user exports or clears it.",
    "network_transmission": "The static library does not upload worksheet data.",
    "data_minimisation": "Record only evidence necessary to reproduce and review the decision.",
    "redaction": "Remove credentials, secrets and unnecessary personal or participant data before export or sharing.",
    "retention_and_deletion": "Apply the engagement retention schedule and clear local browser data when it is no longer required."
  },
  "version_history": [
    {
      "version": "2026.08.27-rc.9",
      "change": "Reworked for plain language, case-focused steps, scoped evidence and transparent draft review status."
    },
    {
      "version": "2026.08.27-rc.9",
      "change": "Migrated to professional catalogue schema v3 with separated outcomes, structured authority, applicability, evidence, decision and review records."
    },
    {
      "version": "2026.08.27-rc.9",
      "change": "Specialist procedure mapped to its task family and current first-party platform guidance and checked for internal consistency; competent review and real execution remain separate."
    },
    {
      "version": "2026.08.27-rc.9",
      "change": "Added explicit preparation and variation/recovery steps plus a bounded representative worked example for paid-template use."
    },
    {
      "version": "2026.08.27-rc.9",
      "change": "Procedure guidance and presentation simplified without changing draft governance status."
    }
  ],
  "migration": {
    "from_schema": "accessibility-test-catalog.v2",
    "from_procedure_version": "2026.08.04.1",
    "migrated_at": "2026-08-27",
    "content_review_state": "commercial_completeness_upgrade_agent_verified",
    "stable_identifier_preserved": true,
    "legacy_url_preserved": true,
    "delivery_model": "professional_delivery_v2",
    "agent_content_validation": {
      "status": "complete",
      "method": "case_specific_semantic_and_operational_checks_v1",
      "checked_fields": [
        "target",
        "state",
        "tool",
        "action",
        "expected_observation",
        "failure_observation",
        "evidence",
        "outcome_rules",
        "claim_boundary",
        "compact_examples"
      ],
      "human_approval_effect": "none"
    }
  },
  "test_type": "platform_interoperability",
  "related_procedures": [],
  "platform_validation": {
    "required": true,
    "evidence_status": "not_executed",
    "real_device_or_at_claimed": false,
    "required_environment_ids": [
      "reduced-motion-os-browser"
    ],
    "calibration_required": true,
    "evidence_refs": [],
    "limitations": "A reduced-motion preference is a platform signal, not proof that every user needs the same presentation or that every motion requirement is satisfied."
  },
  "effort_guidance": {
    "unit": "minutes",
    "setup": {
      "typical": 12,
      "includes": "Confirm scope and target, prepare safe data, establish the required state and record the tool or environment version."
    },
    "per_target_execution": {
      "typical": 15,
      "includes": "Perform the procedure once for one target in its selected states; this excludes remediation and retesting."
    },
    "evidence_capture": {
      "typical": 8,
      "includes": "Capture, name and cross-reference the minimum reproducible evidence while removing unnecessary personal or secret data."
    },
    "technical_review": {
      "typical": 8,
      "includes": "Check applicability, observations, outcome logic, evidence sufficiency and report wording before issue publication."
    },
    "typical_total_range": {
      "minimum": 43,
      "maximum": 62
    },
    "assumptions": "one page with one motion preference and representative triggers; repeat for distinct animation mechanisms",
    "variation": "Add a new per-target execution and evidence allowance for each additional target class or state that could produce a different result. Add setup time for each distinct environment.",
    "excludes": "Client coordination, inaccessible-environment recovery, recruitment, legal review, remediation implementation and waiting time unless the procedure states otherwise."
  },
  "worked_examples": [
    {
      "example_id": "A11Y-MOTION-005-WORKED-001",
      "example_kind": "representative_synthetic_example",
      "context": "Representative synthetic example for Parallax, zoom and vestibular motion on a fictional, version-frozen product target; no client or participant execution occurred.",
      "inspected": "The tester follows S2 (Record OS, browser, OS motion preference and application state) using the target, required state, tool and repeat rule stated in this procedure.",
      "observed_output": "After the tester completes the Parallax, zoom and vestibular motion scenario named Record OS, browser, OS motion preference and application state, the recorded observation for the target is inconsistent with the required result: The actual user preference and baseline are reproducible.",
      "evidence_captured": [
        "example-evidence-001: target and state record for Each selected animation, transition, movement and interaction relevant to Parallax, zoom and vestibular motion.",
        "example-evidence-002: contemporaneous observation from the named method — Before/after recording or frame/timing evidence for the exact motion and task state.",
        "example-evidence-003: comparison note linking the actual observation to the expected result and claim boundary"
      ],
      "tester_reasoning": "The recorded observation does not demonstrate the expected result: The actual user preference and baseline are reproducible. The failed decision is limited to this synthetic target and state; unexecuted coverage is not inferred.",
      "decision": "failed",
      "completed_finding": {
        "finding_id": "A11Y-MOTION-005-example-finding-001",
        "title": "Parallax, zoom and vestibular motion: expected result is not demonstrated",
        "severity": "low",
        "user_impact": "The represented barrier may affect People with vestibular disorders, motion sensitivity, attention-related disabilities or seizure disorders.",
        "evidence_refs": [
          "example-evidence-001",
          "example-evidence-002",
          "example-evidence-003"
        ]
      },
      "remediation_advice": "Change the represented target or process so it demonstrates this result: The actual user preference and baseline are reproducible. Then rerun the affected step and every dependent variation.",
      "reviewer_feedback": "The reviewer confirms applicability, environment, actual-versus-expected comparison, evidence references and bounded wording; unsupported product-wide or conformance language is removed.",
      "final_client_report_wording": "Synthetic training finding: the sampled Parallax, zoom and vestibular motion target does not meet the procedure expectation in the recorded state. User impact and broader scope require evidence from the buyer's real execution.",
      "retest_outcome": "Synthetic retest example: after the represented change, repeat the failed step plus material error and recovery states. Close the finding only when new evidence demonstrates the expected result; otherwise retain the non-pass outcome.",
      "claim_boundary": "This is a representative, synthetic worked example for training and calibration. It is not evidence from a client product, participant or real assistive-technology execution."
    }
  ]
}