Adult Age Differences in Frequency Judgments of Categorical Representations

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Abstract
Adult age differences were examined for relative frequency judgments on a task in which categories had either zero, one, three, or five instances in a study list. Judgments required selecting from pairs of category names which member had the greater representation of instances in the prior list. Contrary to the results obtained in earlier studies using a task in which discrete events vary in frequency of occurrence, an age difference favoring young adults over elderly adults in accuracy of frequency judgments was found for categories. Neither instructional variation (incidental learning vs. Intentional learning) nor variation in priming (cuing vs. Noncuing with the list of categories prior to the study trial) yielded either main effects or interaction effects with age. The results were interpreted in terms of an age deficit in either the storage or the retrieval of memory traces of category names established by the automatic elicitation of implicit associative responses to instances of taxonomic categories.

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