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KMID : 0380319860370000161
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Journal of Korean Research Institute for Better Living
1986 Volume.37 No. 0 p.161 ~ p.168
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The Effect of Feedforward Information on the Accuracy of Movement Recognition
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Abstract
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Two experiments were conducted to investigate the effect of feedformard information on the accuracy of movement recognition. specifically, the concept of corollary discharge(sometimes called synonymously efference copy of central monitoring of efference) was experimentally tested with eighteen female college students in three experimental conditions which were postulated to differ in degrees of feedforward information. The degree of feedforward information was manipulated by the ways in which the criterion movements were presented; i.e., 1) passive presentation, 2) active production, and 3) active preselection, of which the existence and/or the stength of feedforward information was postulated to be of an increasing function.
Subjects were required to accurately estimate, in a completely counterbalanced within-subject design, the difference between criterion movements presented and passively reproduced experimenter-driven ones on the curvilinear repositioning tasks, with(Exp. 1) and without(Exp. 2) feedback involvement.
The analyses of estimation errors(measured in absolute terms) revealed that there were no statistically significant error differences among the three experimental conditions. The data also disclosed that there were no significantly high correlations between actual movement errors presented and subjects´ estimated errors. These, in sharp contrast to the theories and previous findings, were interpreted to indicate that recognition of movement errors is net influenced by the existence of feedforward information, articularly in slow movements where the possibility of feedback involvement is highly likely. That is, it was interpreted to mean that feedforward information in the name of efference copy, corollary discharge, or central monitoring of efference might have a negligible function in the recognition of movement accuracy in slow movements.
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