Visual compensatory, visual pursuit, auditory compensatory, and auditory pursuit tracking of 20 male college students was observed under the conditions of .000-, .210-, .420-, and .840-sec. transmission type control delay. Tracking efficiency decreased as transmission delays increased; visual tracking was consistently superior to auditory tracking, although the relative degradation across delays was greater for visual than for auditory tracking; and little if any adaptation to the delays was apparent. These results point out the essentially similar effects of delayed sensory feedback on equivalent motion patterns when guided by different feedback modalities.
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