Influence of vocabulary-age on unilateral picture-naming reaction times of normal subjects.
The present study measured naming reaction times of normal subjects to unilaterally presented pictures corresponding to vocabulary levels of less than 5.5, 9.5 - 10.5, and greater than 18.0 years of age. An analysis of variance of latencies showed a significant interaction between visual fields and stimuli. Post hoc tests were interpreted to suggest that the normal right hemisphere was capable of performing certain differential picture encoding operations up to 10.5 years of age and not beyond. Also, unlike the left hemisphere, the right hemisphere does not appear to be organized on a developmental hierarchy, which corresponds with the clinical literature.
Rastatter
M P
MP
Department of Communication Disorders, Bowling Green State University, OH 43403.
McGuire
R
R
D000328:Adult; D001288:Attention; D004292:Dominance, Cerebral; D005260:Female; D006801:Humans; D008297:Male; D010364:Pattern Recognition, Visual; D011930:Reaction Time; D012016:Reference Values; D014825:Vocabulary