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  • Title: Comparison of nonretarded and mentally retarded children on a perceptual learning task.
    Author: Terry PR, Samuels SJ.
    Journal: Am J Ment Defic; 1976 Sep; 81(2):167-71. PubMed ID: 970415.
    Abstract:
    The performances of 12 EMR and 12 nonretarded sixth-grade children on a perceptual learning task were compared to investigate the information processing of visually presented stimuli in individuals with different intelligence levels. A minicomputer flashed either familiar (lowercase) or unfamiliar letters (Gibson-like figures) in either a stimultaneous or successive mode on a same-different matching task. The computer automatically calculated accuracy and latency data for each subject. Results showed that accuracy was superior in the nonretarded group and that mean latencies for the EMR group was consistently higher than those of the nonretarded group. However, when latencies were corrected for differences in basic reaction time, there were no significant differences between the groups in the speed of processing the information.
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