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Lecture

IAT 201 Lecture Notes - Interaction Design, Color Blindness, Implicit Memory


Department
Interactive Arts & Tech
Course Code
IAT 201
Professor
Brian Fisher

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IAT201 Week 8 Perception
High-Bandwidth Interaction Design
Much of HCI, information design came from studies and design experience with traditional
computer displays
We must design increasingly complex interactive displays that can be perceived and understood
by users
Individual differences are important
Vision: acuity, focus, stereo sensitivity, colour blindness…
Hearing: sensitivity, noise filtering, environment
Application goals are more likely to be cognitive, social, and experiential
Design & the “Metacognitive Gap”
Intuitions about thoughts, goals and plans (“folk psychology”) are good
Intuitions about how people see, hear, and remember are very inaccurate
-lack of awareness of the limits of intuition is the “Metacognitive gap”
Problem for design-by-intuition
“The eye is like a camera”
-it contains lenses that focus an image on the eyeball
Touch is exploratory and serial
Vision is not parallel and instantaneous
-it is also exploratory
Both senses fill in a “gappy” picture which we believe is complete
Intuition: Visual buffer accumulates data
Rapid visual perception
Non-conscious visual processing
-rapid: < 200 ms
-automatic (no conscious effort)
-spatially parallel
-local operations
-volatile (poor temporal coherence)
Impressions, some motor performance
Direct attention for cognitive processing
“Logic of Perception” (I. Rock) aka “visual intelligence”
1. Transduction stage (light to pixels-retinal color)
-minimal interactions
2. Primary processing (pixels to edges-retinal orientation)
-local inhibition/excitation
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