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ALTERNATIVE STRATEGIES IN THE EVALUATION OF SPEECH SYSTEMS
Final rept. 15 Feb 1968-14 Jul 1969
EDUCATIONAL RESEARCH CORP CAMBRIDGE MA
Pagination or Media Count:
The report summarizes the results of a program of research concerned with the perception of degraded speech in normal and pathological listeners. The comparisons were derived from performance in a two-category judgment task where the anchor values remain accessible to the subject and under the control of the experimenter. Response decisions and frequency of anchor testings are recorded together with decision times in computer compatible tape format. In addition, studies were designed to examine selected features of utility effects and applications of unidimensional and multidimensional scaling procedures. The respective sections of this report describe 1 the development and applications of the modified, non-verbal psychophysical technique 2 the design of a data collection system 3 variations in response utility and 4 selected scaling procedures. These investigations were shown to be particularly appropriate for assessments of communication with vocoded materials in addition to suggesting alternative experimental paradigms for the study of audiological and perceptual problems.
APPROVED FOR PUBLIC RELEASE