PSYCH 111- Chapter 4
PSYCH 111- Chapter 4 Psych 111
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This 4 page Class Notes was uploaded by Alisha Ellis on Saturday October 17, 2015. The Class Notes belongs to Psych 111 at Brigham Young University - Idaho taught by Brother Marrot in Fall 2015. Since its upload, it has received 18 views. For similar materials see Introductory Psychology in Psychlogy at Brigham Young University - Idaho.
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Date Created: 10/17/15
PSYCH 111 Notes Bro Marrott Chapter 4 Sensation amp Perception needs attention It is easy to block out what you are not focusing on You in a bad mood you only think of bad thinks 30 long to do homework when you are on your phone The way you see things are not always the way it is We don t see the way the world really is The tipping tree sound is a perception If we are not in the forest when a tree falls it makes no sound Sound waves though phone sound is made in our heads Sensation vs Perception Sensation is a electrical signal to the brain Light sound pressure odor or taste Perception you assignment of meaning you are interrupting what you are sensing They work together Sensations sounds of your voice lines on a screen Know something happened Perceptions transforms my words into meaning Transduction when energy is converted into an electrical chemicals signal Gustav Fechner Founder of Psychophysics Psycho meaning mind physics meaning physical world Psychophysics relationship between the mind and world Implementation of psychophysics asking if saw hear felt Light sound touch Absolute Threshold amount needed to be detected 50 of the time The brain is designed to notice Change Perceptual process more efficient in detecting change Just Noticeable difference J ND minimal change to detect the change You know the change that happened This depends on the rst stimulus AKA Weber s law Sensory Adaptation Brain noticing only change You get used to the stimuli it is like it is not there Prolonger stimulation declines signals stop firing Visual Magnetic spectrum Blue is short wave length Green is middle wave length Red is long wave length Physical vs Psychological Dimensions of light Length hue color Amplitude brightness Purity richness of color These three properties constitute physical and psychological dimensions of light Visual Acuity clear Vision Anatomy of the eye Retina is in the back of the eye Transduction is when light comes into the eye hits the retina and then is processed into what we see Cones see in color don t work in dim light Rods see in black in white super sensitive to light Fovea only cones Helps us force in on objects 120 million Rods 6 million cones Blind spot no rods or cones where the optic disc is Perception of color Sir Isaac Newton Color not in things Color is a percetnal process Eyes pick up take to brain 3 types of cones Red long wave lenegh Green medium wave lengh Blue shortwavelength Opponent Process Theory Green competes with red Yellow competes with blue Left Visual fieldhits right side of retina and interpreted on right side of brain Right Visual fieldhits left side of retina and interpreted on left side of brain Set to Area Vl help with primary visual cortex in the occipital lobe Area VI lets you make out edging Ventral pathway the what pathway know things Dorsal pathway the where pathway how pathway uses environment to move around DF damage to ventral what pathway Organize visual perception Gestalt psychology the whole is great than the sum of its past Done automatically Several grouping rules Simplicity quick intrpatation Continvity lines have a continues ow Similaritythings that a simpler are grouped together Proximity things close together are put together Figure vs ground Edges separating objects Ground is the Background Figure the thing with edges Area V1 helps us detect edges Another demonstration Looking at something close look down Looking at something far away look up Monocular Depth cue one eye vision Relationship between distance and size Example of texture Gradient seeing texture as you get closer to something Interposition something is in front of you to determine What is closer to farther away Linear perspective Far away is smaller Illusions of perception Ames room Our brain see this as if they were normal the world isn t as we see it We are susceptible to illusions Symbolic implications of our beliefs Paradigms People don t see things the same way you see it Change blindness Inability to detect change in a visual scene Inattentional Blindness not noticing things that aren t the focus to attention Sensation happens without the perstion perstion can t happen without sensation Perceiving motion Movement is major to perceiving an object Changes its location on the retina Area MT is the brain helps you perceive motion Perceiving Sound Perceiving through sound waves Pitch high or low Loudness intensityamplitude Timbre complexity of sound Bar on pg 119 Outer ear Pinna Auditory canal Ear drum Middle ear Ossicles tiniest bones in the body Inner ear Cochlea trucution acoures looks like a snail Basilar membrane hair cells Area A1 part of the temporal lobe helps us perceive sound Place codehelps in the basilar membrane to determine pitch or frequencies Sound waves determine helps you know where sound is coming from Gatecontrol Theory Pain is stopped from giving signal to the brain
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