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Accessible design: How much motion is too much motion?

• Heather Waroff, Senior Designer at Microsoft, writes about interaction design. The most useful part of the article for me was the list below, developed “in conjunction with Accessibility specialists”. It describes the types of motion that are considered safe (good), risky (‘it depends’), and non-compliant (bad).
• Safe Motion:
  • Motion under 5 seconds, of the following types:
    • Show/Hide
    • Glowing
    • Color Transitions
    • Slides
    • Scaling
    • Fading
    • Glyph Transformations
• Risky motion
  • Any motion longer than 5 seconds
  • Background Parallax
  • Object Parallax
  • Bouncing Effects
  • Fast Effects
  • Image Masking on Scroll
  • Full Width Mask on Scroll
  • Zoom on Scroll
  • Scale on Scroll
• Non-compliant motion
  • Any motion longer than 5 seconds without a pause button
  • Strobe Effects
  • Rotate on Scroll
  • Fast exit on Scroll
  • Horizontal Directional Scrolling

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