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Title
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The Influence of Surround on Tracking Performance: I. Tracking on Combined Pursuit and Compensatory One-dimensional Tasks with and without a Structured Surround
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Date
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1953
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Index Abstract
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Coming Soon
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Photo Quality
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Undetermined
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Report Number
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WADC TR 52-229
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Creator
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Senders, J. W.
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Corporate Author
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Air Force Aerospace Medical Research Laboratory
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Extent
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20
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NTRL Accession Number
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AD012618
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Identifier
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AD0012618
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AD Number
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12618
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Access Rights
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Unknown
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Distribution Classification
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1
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DTIC Record Exists
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Yes
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Distribution Change Authority Correspondence
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AFAL ltr
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Distribution Change Action Date
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5/15/2001
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Abstract
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Four groups of subjects performed a series of tracking tasks on 2 different target courses and under 2 conditions of surround illumination. The tasks were varied from pure compensatory (maintaining an indicator on a reference point by compensating for outside influences) to pure pursuit (controlling the follower indicator to keep it superimposed on the target). The apparatus consisted of a CRT display surface upon which was presented a 1-mm spot of light and a 7-mm-diam circle with a rim thickness equal to the diameter of the spot. The dot was controlled only by the problem generator, while the circle was controlled also by the subject. The tasks were arranged so that the required motor output of the subject was the same for all experiments. The subjects were allowed a 2-min rest between successive sets of five 1-min trials, and a 5-min rest between the third and fourth trial sets. The surround illumination was for either the light condition (the whole CRT face, a grid superimposed on it, a pilot light, the CRO itself, and parts of the experimental room were visible to the subject. In the dark condition (all tube illumination was reduced to zero, the pilot lights masked, and all ambient illumination eliminated). The test data indicated superior performance with either surround illumination when a 50% or higher pursuit component was present. The data also indicated the extent and complexity of the interactions between target-course rates, surround illumination, and the percent pursuit component in the task.
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Report Availability
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Not available via Contrails
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Date Issued
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1953-02
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Index In
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50 Years
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Type
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report