Journal of Speech and Hearing Research Vol.7 175-182 June 1964.
© American Speech-Language-Hearing Association
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Influence on Motor Performance of Simultaneous Delayed and Synchronous Pure-Tone Auditory Feedback

Howard B. Ruhm
William A. Cooper, Jr.
University of Oklahoma Medical Center, Oklahoma City, Oklahoma

A study was made of the effect of the presentation order of delay/synchronous (DAF/SAF) intensity ratios on tapping performance under simultaneously presented synchronous and delayed auditory feedback. Comparisons were made between performances of groups who received either primarily positive or primarily negative DAF/SAF ratios in random order. Additional comparisons were made between subjects who received serially presented DAF/SAF ratios in an ascending series and those who were given the same stimuli in a descending DAF/SAF ratio series. It was found that, when synchronous and delayed auditory feedback are presented simultaneously at various DAF/SAF ratios, the presentation order influences the degree of performance disruption. It is concluded that the results of studies involving the use of simultaneously presented SAF and DAF should be interpreted in light of the stimulus presentation order.


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