Amplitude, Position, Timing and Velocity as Cues in Reproduction of Movement

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Abstract
In three experiments the method of average error was used to study the reproductions of amplitudes of standard horizontal arm movements ranging from 45° to 125°. Response sensitivity, in terms of mean difference limens and absolute errors, was relatively precise and constant over the range of movement. However, constant errors exhibited a definite trend in that small movements were constantly overestimated and large ones were underestimated. It was also found that the starting and terminal positions of a movement were important cues in movement reproduction, whereas timing ability and movement velocity seemed unrelated to accuracy.

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