Verbal Mediation in the WAIS Digit Symbol Subtest

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Abstract
It has been speculated that a verbal factor is involved in WAIS Digit Symbol (DS) subtest performance. 60 Ss were supplied with familiar verbal labels, unfamiliar verbal labels, or no labels for each of the symbols of the DS subtest. Pre- and post-DS performance scores and a digit-symbol association score were compared among groups. More digit-symbol associations were recalled after learning familiar than unfamiliar labels, but no differences were found in DS performance. These results were interpreted as minimizing the possibility of a verbal loading and arguing for a psychomotor interpretation of DS performance.

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