Accession Number : AD0638351

Title :   VOICE COMMUNICATION: RETENTION OF IMPROVED INTELLIGIBILITY, II.

Descriptive Note : Memorandum rept.

Corporate Author : PURDUE RESEARCH FOUNDATION LAFAYETTE IND

Personal Author(s) : Hanley,T. D.

Report Date : 19 AUG 1948

Pagination or Media Count : 24

Abstract : The 62 subjects in the study were male undergraduate students at the University, of whom 28 were designated experimental and 34 control. The experimental design included the following steps: (A) pre-training tests (word intelligibility and connected speech intelligibility) under conditions of in-line noise for all subjects; (B) intelligibility training in reduced noise: one hour for the loudness factor and one hour for syllable duration and precision of articulation (enunciation) -- for the experimental subjects only; (C) post-training tests for all subjects and (D) re-tests, following the post-training tests at intervals of 7 and 12 weeks. The following results were obtained: (a) Improvement of trained subjects was greater than improvement of untrained (control) subjects. (b) Trained (experimental) subjects maintained a small margin of superiority on criterion tests at retest intervals of 7 and 12 weeks. This margin of superiority was statistically significant on the word intelligibility test and non-significant on the test of connected speech intelligibility. (c) Mean intelligibility scores attained were lower, differences between experimental and control group means were smaller, and tests were found to be much less reliable than in previous studies. (Author)

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

Subject Categories : Psychology
      Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE