Four male Ss performed compensatory tracking for 20, 2-min. trials on each of four displays differing in the degree of integration of two input signals and in the presence or absence of a secondary interference task with each display. The order of superiority of the displays was consistent with their level of integration, with the most highly integrated display yielding the best performance. The interference task lowered performance on each display, but an expected interaction between display integration and interference task did not prove to be significant.
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