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Inferences about age impairments in inferential reasoning.

Two experiments are reported in which specially constructed series completion tests were administered to samples of young and older adults to determine why increased age is associated with poorer performance on measures of inductive reasoning. The results indicated that young and older adults did not differ significantly in the effectiveness of processes concerned with determining simple relations, but that older adults were impaired when the relations are complex or when different problems involve alternative organizational patterns. We conclude that the poorer performance of older adults relative to young adults on tasks of this type may be due to inadequate (e.g., overly simplistic or temporally instable) relational structures for the integration of problem elements.