Exam 2 Slide Notes

Exam 2 Slide Notes - SENSATION Pg. 3 John Locke=British...

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SENSATION Pg. 3 John Locke=British philosopher, first of threesome called the Empiricists o Said we come into the world as a "tabla rasa" (blank blackboard) Pg. 4 Experience tells us that man + child aren't the same size, child is just closer (beginning of knowledge through association process, according to Locke) Pg. 5 Lionel ___=categorical imperative--opposed Locke, said we're already born with some genetically built-in functions Pg. 6 Absolute Threshold=something must have a certain physical intensity for us to register it There are still qualitative differences in how people experience sensation which are hard to test Pg. 7 Weber=said you have to be able to tell difference btwn things too o Weber's Law=there's a constant, proportionate change of what you feel o Delta I / I = C; as I increases C increases Fechner=scientist of psycho-physics, admirer of Weber o Fechner's Law= S = k log I (k=Weber's C onstant, I=intensity, S=perception of intensity) o As I increases, S increases Pg. 10 Conservative=can make conclusions w/ less info Liberal=need more info to make conclusions Payoff teaches people to say "no" when in doubt Response Bias=accuracy will increase if rewarded for correct answers + punished for wrong ones Pg. 11 Depending on where threshold is, you will make more correct or incorrect calls Pg. 12 Correlation Matrix --can test level of depression Placement of threshold can significantly affect number of people who receive treatment (can be too many or too few) Pg. 15 Johannes Mueller=came up w/ Doctrine of Specific Nerve Energies
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o Ex : Eyes are used to visual signals, so when get mechanical signal (pressure) it's represented as light b/c eyes report to visual part of brain--> It's the nerve connections not type of signals that matter most (Prof. Coons=one of Neal E. Miller's protégés!) William James=born around WSP then became a prof. at Harvard Pg. 16 Sensory Adaptation=As you stare at dot, surrounding shadow disappears Pg. 19 Electromagnetic Waves =stimuli for eyes Wavelength increases from Gamma Rays to Broadcast Radio Pg. 18 Cornea=has transparent, gelatinous lens that focuses entering light + reverses it (but brain straightens it out) Iris=pigmented muscles that open when dark and close when bright to see better Retina=contains photo-receptors that have pigments sensitive to light wavelengths that are converted into electrical signals. Ganglion Cell=axons carry signals to brain Blind Spot=place where axons penetrate retina (no receptors there to see input)--optic nerve Pg. 19 Fovea=bull's-eye receptor in retina that takes in detail Pg. 21 Rods=good for seeing in dark (don't need much light to activate them), don't see color (greater sensitivity over wide range of wavelengths but don't distinguish well btwn them) Duplex Theory=difference btwn rods and cones
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This note was uploaded on 02/23/2012 for the course PSYCH PSYCH 101 taught by Professor Edgarcoons during the Fall '11 term at NYU.

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Exam 2 Slide Notes - SENSATION Pg. 3 John Locke=British...

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