Individual differences in the cerebral organization of language using input and output interference measures of lateralization.
The literature on the relationship between cerebral lateralisation and the combined effects of sex and handedness, reveals many discrepant findings. In an effort to clarify these discrepancies, three different types of interference cerebral lateralization tasks were used in a relatively large sample of normal individuals. Handedness differences were found in the expected direction on all three lateralization measures: input interference (dichotic listening), and two output interference measures, a motor-motor interference task (concurrent finger tapping and verbal fluency) and a motor-cognitive interference task (concurrent finger tapping and silent reading). A sex difference, however, was found on only the motor-motor interference task. These results suggest that possible sex differences in cerebral lateralisation may be less prominent among particular types of interference laterality tasks, and more reliably found with motor-motor interference lateralization measures.
Lewis
R S
RS
Pomona College and Neuropsychiatric Institute, University of California, Los Angeles, USA.
Orsini
D L
DL
Satz
P
P