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Lecture 6

PSY 302 Lecture Notes - Lecture 6: Stereopsis, Visual Acuity, Binocular Disparity

Course Code
PSY 302
Lixia Yang

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Early Cognitive Foundations: Sensation, Perception, and Learning
Concepts and Definitions
Sensation: sensory receptors detect and process basic information form external world
Perception: organization and interpretation of sensory input
Learning: behaviours change as result of experience
Early Controversies
Nature vs. Nurture
Empiricists: (Nurture) infants must learn to interpret sensations
o William James (1890) “blooming, buzzing confusion”
Nativists: (Nature) innate basic perceptual abilities
Differentiation vs. Enrichment
Differentiation Theory (Gibson, 1969)
o Integrated and independent of experience, can be interpreted on its own
o Children explore and learn to detect distinct features
Enrichment Theory (Piaget, 1954, 1960)
o Cognitive schemes, knowledge, experience
Vision: least mature sense I newborns
o Movement, colours, brightness, visual patterns
o Poor visual acuity, blurry
o Require sharper visual contrasts
Early Pattern Preference
Early preference for:
Moderately complex
High contrast
Moving stimuli
Pattern Perception
What defines an object?
Subjective contour
Infants detect static objects by illusory contours around seven months
Object Perception
Perceptual constancy
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