Title: Visual coding strategies and hemisphere dominance characteristics of stutterers
Abstract: The current study examined the visual coding strategies and hemispheric dominance characteristic of stutterers and normal subjects. Subjects were required to phonate the vowel /a/ when tachistoscopically presented a flash of light. Following this procedure, unilateral, tachistoscopic letter-naming reaction times were obtained for the subjects at a rate of presentation producing approximately 90% errors. Adjusted letter-naming reaction times were derived by subtracting the vocal reaction times from the naming reaction times. Results of an ANOVA procedure on the reaction-time data showed that significant differences in letter naming did not exist between the visual fields for the normal subjects. Unlike these findings, however, significant right visual field advantages were found to exist for the stutterers. Analysis of errors showed that the normal subjects' confusions were primarily visual regardless of which visual field received the stimulation. For the stutterers, recognition errors for the left visual field were auditory whereas right visual field stimulations produced primarily visually based errors. Collectively, the current findings were interpreted as suggesting that the stutterers exhibited less efficient right-hemispheric transcoding operations which served to increase reaction times following left visual field input.
Publication Year: 1987
Publication Date: 1987-10-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 10
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot