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Notes from 10/8/15

by: Madeline LeFrock

Notes from 10/8/15 HDFS201010

Madeline LeFrock
Life Span Development
Palkovitz,Robin J

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About this Document

These are notes from the week of 10/8. Topics include Sensation and Perception Distinctions, Orientation Points, Nature/Nurture Controversies, Assessing Infant Perception, and Vision (Anatomy of th...
Life Span Development
Palkovitz,Robin J
Class Notes
25 ?




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This 3 page Class Notes was uploaded by Madeline LeFrock on Sunday October 11, 2015. The Class Notes belongs to HDFS201010 at University of Delaware taught by Palkovitz,Robin J in Summer 2015. Since its upload, it has received 20 views. For similar materials see Life Span Development in HDFS at University of Delaware.


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Date Created: 10/11/15
Perceptual Development Thursday October 8 2015 1239 PM Sensation and Perception Distinctions Sensation is the physical quotsensingquot of the external stimulus 0 Ex when the sound waves hit your eardrum o Perception is assessing and making meaning out of the sensation 0 Highly personal 0 Ex not everyone laughs at the same joke 0 Ex optical illusions can see 2 different images Orientation Points NOT in the book 0 Everything we experience comes through our sensory apparatus at some point 0 The brain interprets sensory input 0 The senses are welldeveloped prenatally and do NOT decline at the same time 0 First sense to develop and last sense to go touch 0 Last sense to develop and rst sense to go vision 0 Sensory capacities are geared toward the social environment NatureNurture Controversies Nature senses appear to be innate or developmature very quickly 0 Nativists nature side Natural understanding at birth 0 Relatively universal patterns of decline Nurture visual and auditory development require stimulation and ALL senses bene t from environmental embeddedness o Empiricists nurture side Infant tabula rasa 0 Born with a blank slate 0 Old age Individual patterns of decline Accumulation of evidence states infants SEEK the stimulation they NEED 0 Infants combine perception with action for exploration sensory motor or sensorimotor 0 Ex if you show an infant a pair of keys their interest prompts them to reach for them and gure out ways to grasp for them Assessing Infant Perception o Behavioral change 0 Ex facial expression sucking rate orienting turning towards something 0 Cephalocaudal growth is the same with behavior as it is with development c Preferential looking 0 Duration of looking at one of a stimulus pair 0 Habituation Learning to be bored Operant Conditioning 0 Learn to react in a particular way to one stimulus o Discriminate the second stimulus o Evoked potentials Record brain39s response to stimuli VISIon Thursday October 8 2015 113 PM Anatomy of the Eye Pupil o Cornea 0 Lens 0 Attached to ciliary muscles contract or relax on the lens to change its thickness 0 Rods black and white vision and Cones color vision see diagram for the rest g Visual Development 0 LAST to develop 0 Try to understand pattern of development 0 By 6th month post conception rods and cones on retina o By 7th month eyes anatomically complete and functional 0 Infant may be startled or turn awayblink due to bright light 0 Myelination of optic nerve is complete by birth but is thin 0 Complete by 25 months 0 Structures do NOT develop at the same rate 0 Lens cornea and retina are relatively large o lris ciliary muscles and DEPTH are immature quotshort eyeballquot 0 Eye of newborn is about 12 the depth Immature accommodation bending of the lens 0 Newborn quot xed focal distancequot 0 Clearest possible thing is on average 810 inches away 0 Acuity is visual clarity how sharp is your vision Changes in Acuity o Newborn is between 20260 and 20600 legally blind o lt20200 in best eye after correction Changes rapidly as eyeball deepens and ciliary muscles develop 20100 by 6 months 2020 by a year Peaks in adolescence Fairly stable until 50 or so then declines 0 Near point gets farther Other Visual Characteristics 0 Color perception and discrimination from 6 months post conception cones 0 At birth red and greens are most pronounced blackwhite o Yellows come in shortly after 0 Depth perception present early on naturenurture controversies Monocular using one eye and binocular cues using 2 eyes and how do they work in conjunction with each other


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