Speech disfluencies under normal and delayed auditory feedback conditions.

20 male and 20 female adults, matched by age, read under conditions of normal and 113-, 152-, 200-, 253-, 307-, and 347-msec. delayed auditory feedback. Disfluency counts were correlated with delayed auditory feedback reactions which were changes in disfluencies under delay conditions. Pearson product-moment and Spearman's rbos were negative and significant for delay times of 113, 153, 200, and 253 msec. The Pearson product-moment correlation for 307 msec. was also negative and significant. Two groups of 11 adults were selected from the original sample on the basis of high and low initial disfluency counts. Their reactions to delayed auditory feedback were compared, using a 2-way analysis of variance with repeated measures (groups X delay times). Both main effects were significant but not their interaction.