Kinesiology 1080A/B Study Guide - Final Guide: Inferior Temporal Gyrus, Visual Cortex

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Document Summary

Grasping mga (max grip aperture), using precision grip. Standard adjustment virtual comparison line on computer to match target size, Perceptual adjustment precision grip used to estimate or match length of object. Jnd"s determined by variance of sd during reproductions, reproductions, representing visual resolution. Results: jnd increased linearly with length for the two perceptual conditions but was unaffected by length for grasping. With constant visual feedback you are able to violate the law: experiment 2: Real time grasping same as original grasping task, mga calculated. Delayed memory based grasping participants vision occluded for 5 seconds then estimate length. Mga"s greater for memory based trials than for real time. They were able to violate weber"s law. Effects of object length on visual resolution during real-time and memory based grasping. Conclusion: the visual guided action (grasping) is based on absolute size - and therefore does not adhere to weber"s law. Grasping: jnd unaffected by changes in target size.