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Lecture 11

KIN 155 Lecture Notes - Lecture 11: Gustav Holst

Course Code
KIN 155
Fran Allard

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Lecture 12~13 – Sensori-Motor Control
Von Holst – Comparatory Theory
fly eristalis experiment
theory: voluntary movement prevents reflex
if reflex prevention is correct, then no reflex for vol. mvmt in L-R reversed
he argued that results can be explained by reafference
comparatory theory model
Lecture 14~15 – Visual Motor Development
Gibson and Walk – the visual cliff
locomotor babies vs. pre-locomotor babies
vision dominates touch
Held and Hein – The kitten carousel
active kitten vs passive kitten
active kitten
active movement allows development of touch
normal behavior in tasks: avoiding obstacles; paw extension
passive kitten
no development in touch, only vision
bumps into obstacles; no pass extension
movement and perception educates each other
perception and movement must occur together to establish difference between exafference +
Campos et al – more visual cliffs
children showed no fear of depth until experienced with self locomotion
walkers improve pre-locomotor children's avoidance of depth
Adolph – visual cliff
tested babies on real cliffs
balance is learned all over again for each posture
control of posture (not depth-perception) learned from self produced movement
Lecture 17 – Visual Control of Action
Milner and Goodale
proposed that there are 2 circuits in visual motor control: ventral + dorsal
Lecture 18 – Time to use Vision
Keele & Posner
concluded that it takes 200 to 250ms to use vision; “visual reaction time”
Lecture 19/20 – Simple Reaction Time
McLeod – SRT
hit cricket ball pitch; skilled batsmen
validates Keele&Posner's estimate of 150~250ms to use vision to control movement
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