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by: Alexandra

Sensation&Perception.pdf PSYC 2010-001

Marketplace > Clemson University > Psychlogy > PSYC 2010-001 > Sensation Perception pdf
GPA 4.29
Introductory Psychology
Chong H. Pak

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Test 3 Class Notes
Introductory Psychology
Chong H. Pak
Class Notes
sensation, perception
25 ?




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This 4 page Class Notes was uploaded by Alexandra on Wednesday October 21, 2015. The Class Notes belongs to PSYC 2010-001 at Clemson University taught by Chong H. Pak in Fall 2015. Since its upload, it has received 26 views. For similar materials see Introductory Psychology in Psychlogy at Clemson University.

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Date Created: 10/21/15
Sensation amp Perception Monday September 14 2015 Eye lgtUJNl 814 AM Pupil 39 adjustable opening where light enters the eye Iris 39 Colored muscle surrounding pupil controls the aperture ofthe pupil 39 responds to light intensity or internal states Lens 39 Focuses light onto retina 39 Small muscles allow lens to change shape accommodation Re na A layer of photosensitive cells in the back surface of the eyeball The retina transduces photons into chemical changes that result in neural impulses o a central area ofthe retina that ONLY contains cones Light reaches the rods and cones Chemical reactions activate the bipolar cell layer Bipolar cells activate the ganglion cell layer The axons of the ganglion cells bunch up to form the optic nerve Highly aggregated summarized info from thousands ofvisual receptors are fed into the Ganglion Ganglion quotseesquot a small part of the world their quot receptive fieldquot Receptors o Rods 120 million Distributed all over retina detects black white greys Primarily responsible for PERIPHERAL vision and vision in the DARK o Cones 6 million concentrated on the fovea function in bright light primarily responsible for detection of DETAIL and COLOR Optic Nerve carries signal from the eye to the brain Blind Spot point where the optic nerve leaves the eye Fovea central point in the retina around which the cones cluster Visual Information Processing 0 In journey from Retina to Brain info is processed abstracted many times at all levels 0 Feature Detection o Nerve cells in the visual cortex respond to specific features angles edges and movements 0 Parallel Processing processing several aspects ofthe stimulus simultaneously 0 Brain divides a visual scene into subdivisions such as color depth form movement etc Shape Detection Specific combos of temporal lobe activity occur as people look at shoes faces chairs and houses Color Vision Monday September 28 2015 842 AM Tri Chromatic Theory of Color Vision 0 Any color can be produced by mixing pure versions of Blue green and red light in different amounts 0 There are 3 types of Cones 0 Each types is most sensitive to particular wave lengths 0 Color Blindness people are blind to green or red 0 Problem 0 Cannot explain o Redgreen colorblind people can see yellow 0 Yellow seems to be a pure color like R G B OpponentProcess Theory of Color Vision 0 Visual elements sensitive to color are group into three pairs 0 The members of each pair oppose or inhibit each other 0 Redgreen o Blueyellow 0 Black white Explains the theory of complimentary colors Color Vision 0 Both theories are correct color processing happens in 2 stages 0 At the retina you have 3 types of cones 0 At the Ganglion Cells there are receptors paired among complimentary


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