Depression and category learning.

This article explores the relationship between depression and category learning. We predicted that depression would impair categorization performance on criteria-attribute tasks, which require systematic hypothesis testing, but not on family-resemblance tasks, which allow processing strategies that are likely preserved in depression. These predictions were confirmed in 2 experiments using different stimuli, tasks, and S populations. We discuss some implications of the empirical connections among depression, the use of less sophisticated cognitive strategies, and category learning.