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Generality of Disfluency Data Collected from Preschoolers

Tape-recorded speech samples were collected from 10 four-year-old boys, both in their preschool classroom and in a structured interview on each of three days spaced one week apart. The frequency and duration of disfluency were computed for each sample. While the distribution of disfluency types and duration (extent) of disfluency were comparable in the two situations, considerably more disfluency was observed in the structured interview. The magnitude of the systematic situational difference in disfluency frequency suggests that it is risky to assume that a sample of disfluency elicited in a structured interview is representative of the behavior in other, more natural situations.