This document contains papers presented at a symposium which was an outgrowth of the research project examining the cognitive deficits in mentally retarded persons. The studies which are discussed were designed to demonstrate that basic cognitive tasks are capable of predicting performance on standard measures of intelligence. The subjects of the research were 141 graduating high school seniors, who were tested on 10 different tasks of cognitive ability. In addition to the 10 tasks, each S completed the Wechsler Adult Intelligence Scale-Revised and a demographic questionnaire. An introduction to the symposium by Douglas K. Detterman briefly describes the research aims and procedures. The results of each of the 10 tasks are presented in separate papers: (1) "Reaction Time, Memory Scanning, and Recognition Correlates of Intelligence" (Frances A. Conners and Douglas K. Detterman), which presents the results of the Choice Reaction Time task, the Sternberg Search Task, and the Recognition task; (2) the paper by Peter J. Legree and Douglas K. Detterman, which discusses the Tachistoscopic Threshold, Tachistoscopic Decay, Learning, and Relearning tasks; and (3) the presentation of Rolf Taylor and Douglas K. Detterman, which reports on the Stimulus Discrimination task, the Self-Paced Probe task, and the Experimenter Paced Probe task. The general purpose of the three papers is to present the data obtained from each task, compare the results obtained in this study with those generally obtained using these tasks, and, where relevant, to compare the results of this research to those obtained in a previous study. (CL)