Qualitative and quantitative differences and patterns of variability in disfluencies emitted by preschool stutterers and nonstutterers during dyadic conversations

Abstract

Disfluencies produced by 24 young stuttering and nonstuttering boys (4 to 5 years old) interacting in three dyadic sessions were analyzed. Each child interacted with his own mother, an unfamiliar mother of a stutterer, and an unfamiliar mother of a nonstutterer. Significant quantitative and qualitative differences were found in the number and types of disfluencies emitted by the two groups of children. Stuttering children with more severe disfluency problems differed quantitatively from those with less severe problems. Total frequency of disfluency was highly consistent for both groups of children. Only two disfluency types (tense pauses and whole-word repetitions) showed significant variability across sessions. This research demonstrates the feasibility of differential diagnosis of young stuttering children.