DEVELOPMENT OF A METHODOLOGY FOR ESTABLISHING VISUAL REQUIREMENTS

GILBERT EDWIN MILLER, Purdue University

Abstract

To evaluate a methodology for setting visual standards by deter mining the relationship between vision and performance on a job-sample test, using subjects possessing a high level of visual skills and reducing their vision using crossed cylinder oblique lenses to obtain the range of vision necessary to determine the manner in which vision is related to job performance.A job-sample test, consisting of 10 diala contained in an Anti- Aircraft Fire Control Unit, was developed and the performance of 10 subjects on the different dials in the job-sample under 5 artificially induced levels of vision was obtained. Two criteria, time and accuracy of response, were used to measure performance. The reliability of the job-sample test was determined using an odd-even split. The data obtained on the two criteria were analyzed using a factorial analysis of various design.The results of the analyses indicated vision was significantly y related to performance. They also indicated that performance differed significantly on the different dials in the job-sample test. Because of the interaction between vision and dials, the results further indicated results from one dial could not be generalized to predict performance on another dialOn the basis of the results obtained in the analyses of variance, both time and accuracy performance curves were developed for each dial to describe the relationship between near visual acuity and job performance. Both mathematical and free-hand curves were developed for time performance and free-hand curves only for accuracy performance.The results of this study indicated the methodology evaluated provides a feasible means for determining the relationship between vision and job-performance which provides a basis from which visual standards can be easily and quickly established.

Degree

Ph.D.

Subject Area

Psychology

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