Abstract
This experiment was designed to investigate the effects of category on retrieval time by the “fixed method”. Five subjects learned a categorized list of 12 items, which was composed of three subgroups of items of Unit Size 2, 4 and 6 chosen from 3 taxonomic categories, and separately a non-categorized list of the same length. After list was throughly learned, subjects were asked to judge whether or not target items belonged to the memorized list. The RTs for categorized condition increased as functions of Unit Size, and were higher than those of non-categorized condition. The latter did not vary with Unit Size. Results were discussed in terms of Atkinson, Herrmann and Wescourt's Mathematical Recognition Model.
