A Color-Contingent Prism Displacement Aftereffect

Perception ◽  
1985 ◽  
Vol 14 (6) ◽  
pp. 691-709 ◽  
Author(s):  
Don C Donderi ◽  
Pierre Jolicoeur ◽  
Ian Berg ◽  
Robert Grimes
Keyword(s):  
Prism Displacement

Prism Adaptation to Moving and Stationary Target Exposures

Perception ◽  
1975 ◽  
Vol 4 (3) ◽  
pp. 341-347 ◽  
Author(s):  
Benjamin Wallace
Keyword(s):  
Arm Movement ◽  
Active Movement ◽  
Moving Target ◽  
Perceptual Adaptation ◽  
Viewing Condition ◽  
Stationary Target ◽  
Prism Exposure ◽  
Prism Displacement ◽  
Availability Model ◽  
Visual Aftereffect

The magnitude of proprioceptive adaptation and visual adaptation to prism displacement was assessed for various target conditions during either observed, active or passive arm movements. Active arm movement was found superior to passive arm movement in the production of proprioceptive aftereffects and visual aftereffects. In addition, observation of a stationary target or a moving target during prism exposure produced significant proprioceptive adaptation for a passive arm viewing condition while enhancing such adaptation magnitude for an active arm movement situation. With no target present during prism exposure, significant proprioceptive adaptation was only found with active movement. The greatest visual aftereffect was produced when a moving target was observed during prism exposure. The results are interpreted in terms of an information-availability model of perceptual adaptation.

Perceptual Adaptation with Selective Reductions of Felt Sensation

Perception ◽  
1975 ◽  
Vol 4 (4) ◽  
pp. 437-445 ◽  
Author(s):  
Benjamin Wallace ◽  
James B Garrett
Keyword(s):  
Additive Model ◽  
Arm Movements ◽  
Perceptual Adaptation ◽  
Prism Displacement ◽  
Different Parts

Hypnotic anesthesia was used to reduce sensation in the adapting arm during prism displacement. Magnitude of adaptation to displacement was assessed by negative aftereffects (NA), proprioceptive shifts (PS), and visual shifts (VS). Hypnotic anesthesia for the entire arm nearly eliminated adaptation as measured both by NA and PS. This was not the case when only portions of the arm (receptor joints) were selectively anesthetized. The sum of NA when different parts of the arm were left unanesthetized at different times equaled such adaptation produced when all those arm locations were left unanesthetized simultaneously. This was also the case for PS. VS, which involved no arm movements, was not affected by hypnotic anesthesia. Support for Wilkinson's component additive model (NA = PS + VS) was found only when the adapting arm was not anesthetized.

Motor-Transformation Learning

Perception ◽  
1974 ◽  
Vol 3 (4) ◽  
pp. 487-496 ◽  
Author(s):  
J C Hay
Keyword(s):  
Memory Retrieval ◽  
Visual Space ◽  
Position Constancy ◽  
Transformation Learning ◽  
Recent Computer ◽  
Displacement Experiments ◽  
Prism Displacement ◽  
Computer Controlled ◽  
Motor Actions ◽  
Parameter Values

Motor-transformation learning theory asserts that people learn through experience what stimulus transformations are under the control of their behavior. More specifically, it asserts that the parameter values of certain predetermined transformation groups are learned. This theory was inferred, in the first place, from research on adaptation to optical rearrangement—in particular, from position-constancy adaptation in inverting-spectacles experiments, prism-displacement experiments, and in more recent computer-controlled feedback experiments. The detailed characteristics of position-constancy adaptation are found to be consistent with the theory. Diverse consequences radiate from the theory for other human abilities, both in perception and in memory retrieval. These diverse implications are tested in studies of (a) learning to manipulate ‘objects’ in an artificial computer-controlled visual space; (b) learning to compute, in the absence of overt action, the consequences of such action; (c) learning how to access the features of prior stimuli by the execution of motor actions.

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