07-Human - Human Capabilities 1 Human Capabilities Human...

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1 1 Human Capabilities 2 Human Capabilities ± Human information processing • Perception • Motor skills •Memo ry • Decision making • Attention
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2 3 Human Information Processing 4 Memories ± Memory properties • Encoding: type of things stored • Size: number of things stored • Decay time: how long memory lasts
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3 5 Short-Term Sensory Store ± Visual information store •En coded a s phy s i ca l image • Size: ~ 17 [7 – 17] letters • Decay: ~ 200 [70 – 1000] ms ± Auditory information store • Encoded as physical sound • Size: ~ 5 [4.4 – 6.2] letters • Decay: ~ 1500 [900 – 3500] ms 6 Processors ± Processors have a cycle time •T p : ~ 100 [50 – 200] ms
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4 7 Perceptual Fusion ± Two stimuli within the same perceptual processor cycle (T p ~ 100 ms) appear fused ± Consequences •1 /T p frames/sec is enough to perceive a moving picture (10 frames/sec OK, 20 frames/sec smooth) • Computer response < T p feels instantaneous • Causality is strongly influenced by fusion 8 Bottom-Up vs. Top-Down ± Bottom-up perception uses features of stimulus ± Top-down perception uses context • Temporal/spatial
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5 9 Another Example I cdnuolt blveiee taht I cluod aulaclty uesdnatnrd waht I was rdgnieg.The phaonmneal pweor of the hmuan mnid Aoccdrnig to rscheearch at
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07-Human - Human Capabilities 1 Human Capabilities Human...

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