Response biasing as a function of duration and extent of positioning acts.

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Abstract
Measured the short-term retention of a blind positioning response with 32 undergraduates as Ss. The dependent variables were the absolute and algebraic errors made in attempting to reproduce a target position at recall. Ss moved lever either forward or backward to an interpolated location after receiving a target. Recall after either 5 or 20 sec. required S to reproduce the target and then the interpolated location. Results support a response biasing effect from the interpolated movements. The largest absolute errors were found for the forward condition, and algebraic errors tended to be positive for the forward condition and negative for the backward and control conditions. Further support for directional biasing was found in the recall estimates of the interpolated locations in which recall errors were in the direction of the preceding target location. Algebraic error revealed a significant Interpolated Location * Retention Interval interaction; errors became more positive for the 20-sec retention interval with the forward movements and more negative for the backward and control conditions. Interpretation of these findings focused not only on the relative intensity of the interpolated tract but also on its relative strength compared to the criterion trace. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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