Graduate Thesis Or Dissertation
 

A comparison of the effect of experimenter and microcomputer delivered knowledge of results on the response speed of nonretarded and mentally retarded students

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  • The purpose of the study was to analyze the effect of experimenter delivered and microcomputer delivered knowledge of results on the response speed of nonretarded and mentally retarded public school students. Response speed was measured for 63 nonretarded students and 63 mentally retarded students. Subjects were randomly assigned to conditions of no feedback, instructor feedback and computer feedback. The design of the project was a Pretest-Posttest Control Group Design (Campbell & Stanley, 1963). The data collected in this study were treated with Analysis of Covariance. The covariate was the pretest score and the dependent variable was the posttest score. Within the limitations of this study, no significant results were obtained and the null hypotheses were not rejected. Baumeister and Ward (1967) and Hoover, Wade and Newell (1981) found that for retarded populations response speed (reaction time and movement time) were susceptible to training. A post-hoc paired t-test indicated that both retarded and nonretarded subjects significantly improved (p<.001) their performances of the response speed task. This change in performance may be attributed to other factors such as the effect of practice and the visual feedback that all subject's received by observing the position, of the stick after each test trial.
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