Reports an experiment with tasks involving memory search for a given probe word with respect to a set of semantic category labels for subjects in a word comparison task and a set of semantic category labels for subjects in the categorization task. The memory search process is fundamentally different in categorization and comparison tasks. (CLK)

Meyer found subjects were faster to determine if a stimulus word was a member of either of two prespecified categories if the categories were close in meaning. A reanalysis of the data favors instead a model emphasizing the role of decision-making processes in categorization and flexibility of task strategies. (CHK)

Expanded version of a talk presented at the meeting of the Eastern Verbal Investigators League, Brandeis University, May 1, 1971. (VM)

The "property-set model" is proposed for concept learning and subsequent recognition and classification of old and new exemplars. In an experimental evaluation of alternative models, the property-set model was the best predictor of both recognition and classification performance. (Author/RM)

In two experiments on free and cued recall, spacing between categorically related items, presentation rate and category size were varied and the effects on recall of items as a function of their serial order were studied. Results suggest subjects organize material during acquisition by retrieving and rehearsing previously studied items. (CHK)