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Stimulus duration effects on vibrotactile magnitude estimation for the tongue and hand

, : Stimulus duration effects on vibrotactile magnitude estimation for the tongue and hand. Bulletin of the Psychonomic Society 24(3): 193-196

The present study was designed to investigate the effect of stimulus duration on vibrotactile sensation magnitude for the lingual dorsal surface and the thenar eminence of right hand through use of the psychophysical scaling method of magnitude estimation. Magnitude estimation values for the tongue and hand were derived from 20 normal young adults. Measurements were made at frequecy of 250 Hz with stimulus durations of 100, 500, and 1,000 msec. Results showed the upper power function exponents to be steeper at all three stimulus durations for the lingual dorsal surface than for the thenar eminence, and the exponents for both the tongue and hand were smaller for 1,000 msec than for 100 msec. Pearson product moment correlations were performed on the subject magnitude estimation responses for the three stimulus durations. The durational correlatiosn were performed independently for both test structures. Correlation coefficients for both test structures at all three stimulus durations tended to increase as stimulus intensity was increased. The correlation coefficients did not reflect changes in the relationship between individual subject responses as a result of stimulus durational changes at any of the sensation levels tested. Results are compared to previous research and discussed in terms of internal scaling mechanisms and learning effect.


DOI: 10.3758/BF03330546

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