Effect of auditory deprivation on visual resolving power.

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Abstract
Changes in the CFF [critical flicker frequency] were determined during and after auditory deprivation (silence). In the 1st experiment human subjects [Ss] were exposed to 1 wk of auditory deprivation, measurements of the CFF being taken at daily intervals and at days 1, 2, 3 and 7 after the termination of the experimental condition. The experimental group exhibited a significant progressive improvement in visual resolving power as a function of auditory deprivation and, following its termination, a gradual decline towards the pre-experimental baseline. Two control conditions, a group of confined Ss and a non-confined group showed no systematic changes in the CFF. In the 2nd experiment the period of auditory deprivation was extended to 14 days. The results revealed a progressive improvement on the CFF during the 1st wk of silence followed by an asymptotic performance during the 2nd wk. The results were related to Schultz''s (1965) sensoristatic theory which predicts intersensory enhancement effects as a function of sensory deprivation.

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