Accession Number : AD0664891

Title :   EFFECT OF AMBIGUOUS TEST RESULTS ON TROUBLESHOOTING PERFORMANCE.

Descriptive Note : Final rept. Apr 66-Apr 67,

Corporate Author : APPLIED SCIENCE ASSOCIATES INC VALENCIA PA

Personal Author(s) : Pieper,William J. ; Folley,John D. , Jr

Report Date : NOV 1967

Pagination or Media Count : 45

Abstract : Forty-eight high school boys, used as subjects, were divided into eight groups of six each. Four of the groups were composed of 'medium' electronic aptitude subjects having scores in the 40 to 65 percentile range on the Airman Qualifying Exam - 62. The other groups contained subjects with 'high,' 75 to 99 percentile, electronic aptitude. Each subject received 11 hours of training and practice in isolating malfunctioning components in data-flow diagrams using the half-split strategy. During testing each subject group worked 24 paper and pencil between-stage troubleshooting problems, one set of 6 at each of four levels of ambiguity (0%, 10%, 20%, and 40%). The performance measures used were: (1) isolation time, (2) number of isolation tests, and (3) identification errors. Subject aptitude had the greatest effect on speed (isolation time) and accuracy of identifying the guilty component (identification errors). On the other hand, aptitude had no effect on the application of the troubleshooting strategy since both medium and high aptitude subjects used the same number of tests in solving the problems. Ambiguity of test results affected speed, accuracy, and application of the strategy. The greater the percentage of ambiguous test results, the more time required, the less accuracy attained, and the greater the number of checks used in solving the problems. As expected, the four problem sets had significant effects on speed, accuracy, and the number of tests used to solve the problems. However, there were no significant interactions between this variable and aptitude, ambiguity, or the aptitude by ambiguity interaction. (Author)

Descriptors :   (*MAINTENANCE PERSONNEL, *APTITUDE TESTS), (*ELECTRONIC EQUIPMENT, MAINTENANCE), ELECTRONIC TECHNICIANS, PERFORMANCE(HUMAN), TRAINING, FAILURE, ELECTRONICS, JOB ANALYSIS, EXPERIMENTAL DESIGN

Subject Categories : Humanities and History

Distribution Statement : APPROVED FOR PUBLIC RELEASE