A STUDY OF VISUAL SEARCH USING EYE MOVEMENT RECORDINGS: VALIDATION STUDIES.
Rept. no. 3 (Annual), 1 Jan-31 Dec 67,
HONEYWELL INC ST PAUL MINN RESEARCH DEPT
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The document covers a program of study of the visual search process. During previous experimentation, peripheral discrimination gradients have been determined for several stimulus attributes -- color, size, shape, and lightness. The present study attempted to validate the predictive capacity of the data base and a model of visual search. Two experiments were conducted. In the first experiment, subjects searched for information in a variety of actual map segments. The predictions were found to have very little relationship to the obtained search times. Several possible reasons for failure of the model are discussed. In the second experiment, predictions were made of the time required to find targets in relatively unconstrained abstract fields containing many objects of different size or different color. Here the models predictions were quite precise. It was concluded that, for accurate prediction of search times in complex situations, as represented by information to be located in maps, more information is required about two aspects of the search process -- the effect of target visibility and the peripheral discriminability of alphanumerics. Author
- Human Factors Engineering and Man Machine Systems