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.

Transcript

1. Humans and interfaces
   

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2. Consider your users
   • Gender, age, education, family
   • Mood
   • Time
   • Environment
   • Language skills
   • Other activities
   

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3. Humans as devices
   • Input: visual, auditory, touch
   • Processing: cognition, memory
   • Output: mouse, keyboard, touchscreen
   

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4. Model Human Processor
   Card, S.K; Moran, T. P; and Newell, A. The Model Human Processor: An Engineering Model of Human Performance.
   

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5. Keystroke-level modeling
   

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

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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
   

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8. Useful timing constants
   • 50-100ms: “instantaneous”
   • 1-2s: common delay in networks
   • 10-15s: serious breakdown, forgotten context
   

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9. Touch target size
   • Apple: 44x44 px on 164ppi (iPhone)
   • 0.7-1.0 cm
   

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10. UI evolution: command line
    

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11. UI evolution: GUI/WIMP
    

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12. UI evolution: touch
    

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13. UI evolution: voice
    

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14. “Pictures Under Glass”
    Bret Victor. A brief rant on the future of interaction design
    

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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
    

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