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Nine stutterers and nine nonstutterers at each of three age levels (5 years, 9 years, and 18 years and above) responded to the onset of 21 1-kHz tones by depressing the index finger of their preferred hand on a response key. Finger reaction times (FRTs) were measured to the nearest millisecond and compared to the voice reaction times (VRTs) obtained from the same subjects. Increased speed and stability of the finger reaction times were observed as an inverse function of age for both groups. The stutterers, as a group, exhibited mean FRTs which were significantly longer and more variable than those of the nonstutterers at each of the three age levels. High correlations also were found between the finger and voice reaction scores for both the stutterers and the nonstutterers. Results support the inference that some stutterers may exhibit difficulty in the consistent execution of motor control strategies common to both speech and nonspeech movements.

Sixteen 7 year-old children with normal articulation, and sixteen 7 year-old children with defective articulation were compared as to their performance on series of language tests designed to assess the child's knowledge of form class, sentence structure, and phonological composition in English. Results showed that children in the defective articulation group gave significantly fewer paradigmatic responses in a word-association test, were less able to discriminate possible from impossible phoneme sequences in English, and were able to repeat fewer sentences correctly than children in the normal articulation group. These results are discussed in terms of their implications for present articulation therapy, which stresses the production of individual sounds and often provides little or no remedial experience in the wider aspects of language usage such as would seem required by results of the present study.

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