Small cycle-to-cycle variations of voice fundamental frequency (vocal jitter) were examined for sustained phonations of vowels (/i,a,u/) produced by 20 young adults and 20 older adults. Jitter was measured by an automatic fundamental frequency tracking program which utilized a peak-picking method of voice analysis. Results showed that the average jitter of the older adults was significantly greater than that of the young adults. It was also found that the jitter magnitudes differed significantly among the vowels. Implications of the findings to aging effects on voice and early detection of laryngeal dysfunction were discussed.

The ability to selectively attend to an auditory stimulus appears to decline with age and may result from losses in the ability to inhibit the processing of irrelevant stimuli (i.e., the inhibitory deficit hypothesis; L. Hasher & R. T. Zacks, 1988). It is also possible that declines in the ability to selectively attend are a result of age-related hearing losses. Three experiments examined whether older and younger adults differed in their ability to inhibit the processing of distracting stimuli when the listening situation was adjusted to correct for individual differences in hearing. In all 3 experiments, younger and older adults were equally affected by irrelevant stimuli, unattended stimuli, or both. The implications for auditory attention research and for possible differences between auditory and visual processing are discussed.

Preschoolers’ verbal abilities influence their verbal interactions with play partners. Previous research has suggested that preschoolers with specific language impairment (SLI) are more likely to initiate conversations with adults than with peers, as compared to their typically developing peers. This study investigated a teacher-implemented procedure, redirects, as a means to facilitate initiations to peers. A redirect occurs when a child initiates to the teacher, and the teacher then suggests the child initiate to a peer, thereby redirecting the child from an adult to a peer. Four preschool boys with SLI participated in the study. The teacher training was successful in increasing the teacher’s ability to redirect the children’s initiations. The children consistently responded to redirects by initiating to peers, and most redirected initiations received conversational responses from peers. Generalization effects to spontaneous peer initiations following the intervention period were demonstrated for 2 of the boys.

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This work describes the importance of the transcription process in studies of speech and language acquisition. Using data collected from a hearing child of deaf parents, the three authors derived independent transcriptions of the same speech sample and systematically compared their transcripts with each other and with the best estimate of the speaker's actual productions. The resultant transcripts were used to produce two descriptions of this child's phonological system, one based on a liberal estimate and one on a conservative estimate of the potential error in the transcripts. Discussion includes suggestions for deriving percentages of inter-transcriber agreement and the utility of such figures as a metric of transcription difficulty as well as transcriber ability.