Evaluation of delayed auditory feedback (DAF) effect: comparison between subjective judgments and objective measures.
The effect of Delayed Auditory Feedback (DAF) on speech duration was evaluated subjectively and measured objectively in 30 subjects (10 normals, 10 nonfluent aphasics and 10 fluent aphasia). The average correlation coefficient between the subjective and objective data was .52 for 180 msec. delay and .46 for 360 msec. delay. Analysis of variance of data derived from the two methods showed the same highly significant differences among groups, delay and tasks. We conclude from these results that both objective and subjective procedures are equally useful in evaluating DAF effect on speech duration, and that both may also be valuable in assessing other types of behavior.
D001037:Aphasia / Q000523:psychology*; D001039:Aphasia, Broca / Q000523:psychology*; D001041:Aphasia, Wernicke / Q000523:psychology*; D005246:Feedback; D006801:Humans; D007600:Judgment; D011930:Reaction Time; D013067:Speech Perception; D013068:Speech Production Measurement