Abstract
Abstract The purpose of the present investigation was to perform a direct test of Laabs's (1973) theory of motor short-term memory utilizing a constrained, experimenter-defined movement paradigm. Two groups of subjects were tested on their accuracy in reproducing either the end location or extent of the criterion movement following immediate, 15-second unfilled and 15-second filled retention intervals. The results indicated that in terms of variable error (VE) the reproduction errors of the location group increased over the unfilled retention interval while those of the distance group remained stable. This finding is in direct opposition to the pattern of results predicted by Laabs's theory. In terms of constant error (CE) the results provided only partial support for the pattern of results predicted by the theory. The results were interpreted as being generally nonsupportive of Laabs's theory.
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