Perception Study Guide 2

Important Terms/Concepts

Form/Pattern Perception 
            Detection

            Discrimination

            Identification

            Luminance change – definition of form contour

Structuralist approach

            Analytic introspection

            Elemental components

Spatial scales (low, med, high: info present at each level)

Hybrid images

Multi-channel approach 
        contrast 
        orientation 
        spatial frequency and phase

        Lens transfer function
         information carried by high vs. low spatial frequency 

Contrast sensitivity functions

cross-species comparisons

developmental

scotopic vs. photopic systems  
            spatial frequency channels: selective adaptation

contrast normalization

Texture discrimination: pop out effects 

Gestalt theory 
        pragnanz 
        laws of organization 
            similarity 
            good continuation 
            proximity 
            closure 
 Color vision

    Hue, brightness, saturation 
    pure light vs. composite light 
    Representations of color 
        Newton's color circle: properties and shortcomings 
        Revised color circle 
        spectral vs. non-spectral colors 
        additive vs. subtractive color mixing 

        Color contrast and constancy effects
    Physiology of color 
        Retinal trichromacy 
            short, medium, and long cones 
            why three cone types and not 1, 2, or hundreds?

Important difference between S, M, L cones 
            color blindness and deficiency 
                protanopia 
                deuteranopia 
                tritanopia 

Genetics of color deficiency

Evolution of color pigments in cones
        Opponent processing of color 
            retinal/LGN hookup  

Depth and distance perception 
            absolute and relative distance

Allocentric and egocentric direction

Inversion goggles 
    Cues to depth and distance 
        Ocularmotor cues 
            accomodation 
            convergence 

Binocular cue for depth and distance: Retinal disparity 
            stereopsis

            horopter 
            corresponding retinal points 
            crossed vs. uncrossed disparities 
            stereopictures 
            random dot stereograms 

binocular rivalry
            feature matching vs. spatial frequency analysis

            stereoblindness -- strabismus 

Monocular cues 
            linear perspective 
            interposition 
            retinal image size 
            texture gradient 
            motion parallax 
            Illusions based on monocular cues 
                Ames window 
                Muller-Lyer 
                Ponzo illusion 
                moon illusion 
                perceived distance explanation for illusions

                Emmert’s law