ERIC Number: ED168727
Record Type: RIE
Publication Date: 1979-Mar
Reference Count: 0
The Development of Analog and Propositional Representations in Semantic Memory.
Duncan, Edward M.
The purposes of this experiment were: (1) to examine the development of categorical representations by comparing the performance of children of various ages to adults, and (2) to compare the internal representations of basic level and superordinate categories. Subjects were 48 children (in second, fourth and sixth grades) and 16 adults. The stimulus pictures consisted of 80 line drawings of objects belonging to five categories. On each trial the experimenter orally presented a category name to the subject, then advanced a slide tray exhibiting an arrow which indicated the orientation of the test stimulus. When the subject felt prepared for the test picture, he or she pressed a foot pedal which stopped the timer (measuring preparation time). Approximately one second later the test stimulus was presented, and again the timer was activated and stopped by the response of the subject (measuring discriminative response latency to the test situation). The analysis of the preparation times indicated that superordinate representations are generated and rotated at the same rate as basic level representations. In contrast, the analysis of the response latencies to the test response stimuli revealed that the representations are different. For basic level trials, neither typicality nor response type interacted with the angle of rotation. For superordinate trials, there were significant effects of age level, typicality, and angle of rotation. (Author/MP)
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: N/A
Note: Paper presented at the Biennial Meeting of the Society for Research in Child Development (San Francisco, California, March 15-18, 1979)