Psychology Notes - Chapter 8 Perception Perception Bottom Up Processing o An analysis of the action feature detectors in a sensory experience Top

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 8: Perception Perception Bottom Up Processing o An analysis of the action feature detectors in a sensory experience Top Down Processing o An analysis of the effects of expectations and prior learning on a  sensory experience Receptive Field and Feature Detectors Receptive Field o The portion of the visual field to which a cell responds in the  nervous system when visually stimulated Feature Detector o A visual neuron that is sensitive to a particular visual feature, such  as shape, edges, or movement  Ganglion Cell Receptive Fields On-center cells o Ganglion cells that respond in an excited fashion when light falls in  the center and when darkness falls on the surround Off-center cells o Ganglion cells that respond in an excited fashion when light falls in  the surround and darkness falls on the center Cortical Feature Detectors Simple Cells o Neurons in the striate cortex that respond to position and  orientation in their receptive field Depth Perception The perception of depth arises from a combo of cues that creates the  illusion of three dimensions Binocular Cues to Depth o Require both eyes Monocular Cues to Depth
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
o Requires only one eye Binocular Cue of Retinal Disparity Each eye has a slightly different view of the world o The difference in views from each eye produces depth perception Binocular Cue of Convergence A cue to depth resulting from the eyes turning inwards to see near objects Monocular Cues to Depth Interposition -  Objects in front block view of objects behind them Relative Size -  Nearby objects cast larger image on retina than distant  objects Linear Perspective -  Lines converging on horizon convey distance Relative Clarity -  Nearby objects are clearer than distant ones Texture Gradient -  nearby objects have more texture than far away ones Relative Motion -  nearby objects move faster than far away ones Perceptual Constancies The perceptual world appears _ even though the _ is constantly _ Size Constancy o The tendency to see a figure as being the same size, despite  changes in its retinal size Shape Constancy o The tendency to see a form as unchanging despite changes in its  retinal size Lightness Constancy o The tendency to see an object as being the same, even under  varying light intensities Conscious and Unconscious Processes in Perception Blindsight o The case of D.B.
Background image of page 2
Vision loss in left visual field, resulting from brain surgery Shown stick in blind field - claims he cannot see it The Striate Cortex and Consciousness Patients with damage to striate cortex can respond to visual stimuli, even 
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/24/2008 for the course PSYC 2010 taught by Professor Smith during the Spring '08 term at Auburn University.

Page1 / 19

Psychology Notes - Chapter 8 Perception Perception Bottom Up Processing o An analysis of the action feature detectors in a sensory experience Top

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online