Forty-four right-handed participants were assessed on 2 occasions 6 weeks apart on electrophysiological measures of activation asymmetry derived from spectral estimates of electroencephalogram (EEG) alpha power in homologous scalp electrodes. Approximately 4 months following the final EEG assessment. participants were administered a dichotic listening CV-syllables task. Overall, participants exhibited a highly significant right-ear advantage. Differences among individuals in ear asymmetry were predicted by the earlier recorded electrophysiological data. Participants with greater activation in left-sided posterior temporal and parietal regions showed a larger right-ear advantage. In addition, a larger right-ear advantage was predicted by right-sided prefrontal activation. These data indicate that some of the variance in dichotic listening performance can be explained by dispositional activation asymmetries and is associated with a complex pattern of posterior and anterior activation asymmetries.
Baseline asymmetries in brain electrical activity predict dichotic listening performance
Neuropsychology
Format:
Journal Article
Publication Year:
1996
Pages:
241-246
Library/Archive:
(c) 2012 APA, all rights reserved
Sources ID:
22682
Visibility:
Private
Zotero Collections:
Contexts of Contemplation Project
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Contexts of Contemplation Project