ERIC Number: ED355716
Record Type: RIE
Publication Date: 1992-Nov
Hemispheric Object Naming and Interhemispheric Transfer Functions in Reading Disordered Subjects.
Kaderavek, Joan N.; And Others
This study measured unilateral, tachistoscopic naming reaction times of 30 normal and 30 reading-disordered children (mean age of 9.3 years) to objects representing two levels of picture vocabulary age. Reading disabled subjects are enrolled in the Reading Center, a diagnostic and treatment program for disabled readers at Bowling Green State University (Ohio). Results of analysis of the latency data showed main effects for Group and Stimuli, but not for Visual Field. All interactions were nonsignificant. The latency results obtained for each group appear to be explained by an interhemispheric transfer theory which indicates that, although each hemisphere may be capable of performing a component of a given processing task, the stage of processing required to complete the operation is functionally localized to one hemisphere. Analysis of the error data showed that significant differences in error rate existed between groups as a function of each visual half field. Significant differences existed between the two visual fields for the reading-disordered group but not for the normal reading subjects. Findings suggest that the left hemisphere of the reading-disordered subjects experienced difficulties with the integration of local and global form discriminations when responding to visual information displayed within brief presentation windows, and suggest that interhemispheric transfer deficits may underlie certain types of reading disorders in children. The paper concludes that reading-disordered children evidence difficulties in lower or early level recognition of visual information and this problem is significantly compounded when visual images are forced to cross the corpus callosum from the right to left hemisphere. (Contains 17 references.) (JDD)
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: N/A
Note: Paper presented at the Annual Convention of the American Speech-Language-Hearing Association (San Antonio, TX, November 20-23, 1992).