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DDVE design class. Humans and interfaces

1591ee5da3f4480605ace6fcc0b8d43f?s=47 Jaanus Kase
December 12, 2011

DDVE design class. Humans and interfaces

I presented this material with my colleague Priidu Zilmer as part of a two-day design workshop for Tartu University’s Design and Development of Virtual Environments Master’s program. See www.ddve.ee for more info.

1591ee5da3f4480605ace6fcc0b8d43f?s=128

Jaanus Kase

December 12, 2011
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Transcript

  1. Humans and interfaces

  2. Consider your users • Gender, age, education, family • Mood

    • Time • Environment • Language skills • Other activities
  3. Humans as devices • Input: visual, auditory, touch • Processing:

    cognition, memory • Output: mouse, keyboard, touchscreen
  4. Model Human Processor Card, S.K; Moran, T. P; and Newell,

    A. The Model Human Processor: An Engineering Model of Human Performance.
  5. Keystroke-level modeling

  6. Fitts’s Law Time to target is a function of target

    distance and size.
  7. Hick’s law The time to make a decision is a

    function of the number of choices. More choices = longer. • Oranges • Apples • Oranges • Apples • Cabbage • Carrot • Cherries
  8. Useful timing constants • 50-100ms: “instantaneous” • 1-2s: common delay

    in networks • 10-15s: serious breakdown, forgotten context
  9. Touch target size • Apple: 44x44 px on 164ppi (iPhone)

    • 0.7-1.0 cm
  10. UI evolution: command line

  11. UI evolution: GUI/WIMP

  12. UI evolution: touch

  13. UI evolution: voice

  14. “Pictures Under Glass” Bret Victor. A brief rant on the

    future of interaction design
  15. “Are we really going to accept an Interface Of The

    Future that is less expressive than a sandwich?” Bret Victor. A brief rant on the future of interaction design