Abstract
Each of 20 adult male nonstutterers read the 331-word “Rainbow Passage” 15 consecutive times. The mean number of instances of disfluency during each of the 15 readings was determined. The initial course of the nonstutterers' adaptation was reflected in a negatively accelerating curve. The greatest amount of adaptation occurred on the first repetition, and most of the adaptation occurred in the early readings. The curve reached a minimum on the ninth reading. This suggests that the course of non-stutterers' disfluency adaptation during oral reading possesses the four characteristics considered by Wingate (1966) to be descriptive of the course of stutterers' adaptation. Several implications are discussed.

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