Effect of sentence structure on stuttering

The elicited speech of 20 adult male stutterers was analyzed to determine the effect of the number, type, and location of relative clause structures on the frequency of stuttering. The selected structures were identified on the basis of transformational grammar. The findings indicate that the frequency of stuttering increases significantly with an increase in the number of relative clauses included in a matrix sentence structure. The results also indicate that the more severe the stuttering is, the more the stutterer is likely to be affected by this variable. Trends toward more frequent stuttering in the postverbal relative clause and the adjectival form of the relative clause were observed.