Articles  |   December 1965
Factors Influencing Electrophysiologic Responsivity in Normal Adults
 
Author Notes
  • © 1965 American Speech-Language-Hearing AssociationAmerican Speech-Language-Hearing Association
Article Information
Articles   |   December 1965
Factors Influencing Electrophysiologic Responsivity in Normal Adults
Journal of Speech, Language, and Hearing Research, December 1965, Vol. 8, 323-347. doi:10.1044/jshr.0804.323
History: Received May 13, 1965
 
Journal of Speech, Language, and Hearing Research, December 1965, Vol. 8, 323-347. doi:10.1044/jshr.0804.323
History: Received May 13, 1965

Electrodermal and electroencephalic responsivity to sound and to light was studied in 96 normal-hearing adults in three separate sessions. The subjects were subdivided into equal groups of white men, white women, colored men, and colored women. A 1 000 cps pure tone was the conditioned stimulus in two sessions and white light was used in a third session. Heat was the unconditioned stimulus in all sessions. Previously, an inverse relation had been found in white men between the prominence of alpha rhythm in the EEG and the ease with which electrodermal responses could be elicited. This relation did not hold true for white women. The main purpose of the present study was to answer the following questions: (1) are the previous findings on white subjects applicable to colored subjects? (2) are subjects who are most (or least) responsive electrophysiologically on one day equally responsive (or unresponsive) on another day? and (3) are subjects who are most (or least) responsive to sound equally responsive (or unresponsive) to light? In general, each question was answered affirmatively. Other factors influencing responsivity were also studied.

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