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PSYCH 100s Week 4 Notes

by: Isabella Sturgeon

PSYCH 100s Week 4 Notes PSYX 100S-03

Isabella Sturgeon
GPA 3.67
Intro to Psychology
Kali Diane Strickland (P)

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About this Document

Hello everyone! These are my week four notes! This covers chapter 4 of Psychology: Themes and Variations.
Intro to Psychology
Kali Diane Strickland (P)
Class Notes
Psychology 100s, Introduction to Psychology, Psychology: Themes and Variation
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This 3 page Class Notes was uploaded by Isabella Sturgeon on Tuesday September 22, 2015. The Class Notes belongs to PSYX 100S-03 at University of Montana taught by Kali Diane Strickland (P) in Fall 2015. Since its upload, it has received 38 views. For similar materials see Intro to Psychology in Liberal Arts at University of Montana.


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Date Created: 09/22/15
92115 Psychology 1005 Chapter 4 Sensation and Perception Anatomy of the eye Cornea light first enters Lens focuses the light on the retina Pupilregulates the amount of light Optic Nerve hole in the eye where fibers exit the eye to connect to the brain Retina absorbs light process images and transmits them to the brain via the optic nerve Photoreceptor cells are layered through the retina o Rods black and white low light vision 0 Cones color and daylight vision Fovea contains only cones Optic chiasm where the optic nerve fibers cross over to the other side of the brain Visual Processing Additive color mixing adding more light to the mixture think about all of the colors that can be seen when light is shinning through a prism Subtractive color mixing removing wavelengths by mixing colors which cancels other colors wavelengths out Theories of Color Vision 0 Trichromatic theory I Three types of receptors that pick up red green and blue I Color blindness usually means that a person is dichromatic and missing most commonly red or green receptors 0 Opponent Process Theory I Receptors make the opposite responses to three pairs of colors RedGreen YellowBlue BlackWhite 0 Both colors are needed Depth Perception where objects are located in space 0 Informed by binocular cues that depend on both eyes Monocular cues based on one eye s perspective 0 Motion parallaxclosed objects move faster 0 Pictorial depth cues evidence of distance that can be seen even if the picture is 2 dimensional I Linear Perspective two straight lines that look closer together the farther away they are I Interposition can tell the distance by overlap I Texture gradient can see texture in a part of the photo shows that it is closer I Relative size the larger the object the closer it is if all objects are the same I Height in the plane closer objects are lower in the plane Feature detection theory detection of specific elements and assemble them into complex forms starting at the basic elements and forming an overall picture 0 Bottom up processing Top down processing whole to its elements form a hypothesis of the work as a whole analyze features to confirm hypothesis Gestalt Psychology perceive whole objects rather than isolated pieces of sensory information o Similarity closure proximity Phi Phenomenon The illusion of movement created by presenting visual stimuli in rapid succession Perceptual set readiness to perceive a stimulus in a particular way viewing Auditory System Stimulus sound Vibration of molecules passing through a medium usually air 0 Amplitude loudness o Wavelength pitch 0 Clarity timbre Hertz unit of frequency used to measure sound pitch Decibels used to measure amplitude 0 Over 120 is painful to humans Anatomy of the Ear External vibration of air molecules Pinna sound collecting cone that funnels to the auditory canal Middle Ear Vibrations of moveable bones osicles hammer anvil stirrup nner Ear Cochlea converts vibrations into waves in fluid and membranes which transduces them to neural impulses Basilar membrane neural tissue that divides the cochlea Theories of hearing Place Theory 0 Pitch vibration of different places along the basilar membrane Frequency theory 0 Pitch rate at which the entire basilar membrane vibrates Wavelength Theory Human Echolocation ability to detect objects by sensing the echoes from the objects Sound Processing Inferior colliculus midbrain sound integration Medial geniculate nucleus thalamus Primary auditory cortex temporal lobe Gustatory System Stimuli soluble chemical substances Receptors taste cells in the taste buds on the tongue 0 10day life span 5 Primary tastes 0 Sweet Sour Bitter Salty Savory Umami o No areas on the tongue for certain tastes Taste preference is learned and influenced by social processes Taste aversion is developed evolutionarily or in response to pairing of food with illness Taste sensitivity is genetic 0 Non tasters have 1A the amount of taste buds as super tasters cannot taste PTC 0 Super tasters women usually Sensory adaptation can affect how the next stimulus is perceived Opponent process in taste 0 Saltybitter o Soursweet If you have 5 glasses of water regular sour sweet salty bitter if you give one and then regular they will taste the other taste OOOO Olfactory System Stimuli substance carried in air 0 Dissolved into mucus of the nose Receptor olfactory cilia 0 Upper portion of nasal passage Only sense that does not go through the thalamus Goes directly to the olfactory bulb at the base of the brain Odor is very important to taste Head cold food can taste bland Mechanical chemical and thermal energy Receptor 6 types Majority of somatosensory cortex processes signals from fingers lips and tongue Sensors around the area are inhibited to determine the exact location of the touch Absolute threshold Minimum intensity stimulus can be detected about 50 of the time nattentiona blindness Without focusattention stimulus is not perceived Where does light first enter the eye Cornea


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