Abstract
This study investigated whether working memory capacity could account for individual differences in verbal fluency. Working memory was assessed by the speaking span test (Daneman & Green, 1986) that taxes the processing and storage functions of working memory during sentence production. Verbal fluency was assessed by (1) a speech generation task in which subjects made a speech about a picture; (2) an oral reading task in which subjects read aloud a prose passage; and (3) a Baars, Motley, and MacKay (1975) task for eliciting oral slips of the tongue (e.g.,wet gun forget one). Speking span was significantly correlated with performance on all three tasks; individuals with small speaking spans were less fluent and more prone to making speech errors. Whereas speaking span was related to individual differences in verbal fluency on the speech and reading tasks, reading span, a measure included to assess working memory capacity during sentence comprehension, was only significantly related to individual differences in verbal fluency on the reading task. The methodology proved useful for revealing whether a particular kind of oral reading error reflected a reading failure or an articulatory failure.
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This research was supported by a grant from the Natural Sciences and Engineering Research Council of Canada.
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Daneman, M. Working memory as a predictor of verbal fluency. J Psycholinguist Res 20, 445–464 (1991). https://doi.org/10.1007/BF01067637
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DOI: https://doi.org/10.1007/BF01067637