Accession Number : AD0638350

Title :   VOICE COMMUNICATION: EFFECT OF STRESS CONDITIONS ON SPEAKER INTELLIGIBILITY.

Corporate Author : PURDUE RESEARCH FOUNDATION LAFAYETTE IND

Personal Author(s) : Harris,Jane S.

Report Date : 17 SEP 1948

Pagination or Media Count : 24

Abstract : The purpose of this study was to investigate the effect of distracting (stress) conditions on the intelligibility of voice communicators. Subjects were 14 male students enrolled in a beginning speech class at Purdue University. The procedure was as follows: (a) the subjects were trained for one hour in techniques for increasing loudness and one hour in precision of articulation for voice communication in noise; (b) the 24-word multiple-choise intelligibility test was administered under standard conditions and recorded on wire; (c) three weeks later the subjects were again tested on another form of the same test under distracting conditions (threat of electric shock and addition of an unrelated task to be performed simultaneously with the reading of the word list), also recorded on wire; (d) both tests were played back to a group of listeners who marked the multiple-choice answer forms for the VCL word lists and also compared each speaker's two performances on a subjective scale. Analyses of data included: comparison of percent word intelligibility under the two conditions, subjective rating of stress conditions test as compared to normal conditions test, performance on distraction task, measures of intensity and syllable duration under both conditions. (Author)

Descriptors :   (*VERBAL BEHAVIOR, STRESS(PSYCHOLOGY)), (*SPEECH TRANSMISSION, *INTELLIGIBILITY), (*VOICE COMMUNICATIONS, INTELLIGIBILITY), SPEECH RECOGNITION, PERFORMANCE(HUMAN)

Subject Categories : Psychology
      Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE