The dynamic nature of language lateralization: effects of lexical and prosodic factors.
In dichotic listening, a right ear advantage for linguistic tasks reflects left hemisphere specialization, and a left ear advantage for prosodic tasks reflects right hemisphere specialization. Three experiments used a response hand manipulation with a dichotic listening task to distinguish between direct access (relative specialization) and callosal relay (absolute specialization) explanations of perceptual asymmetries for linguistic and prosodic processing. Experiment 1 found evidence for direct access in linguistic processing and callosal relay in prosodic processing. Direct access for linguistic processing was found to depend on lexical status (Experiment 2) and affective prosody (Experiment 3). Results are interpreted in terms of a dynamic model of hemispheric specialization in which right hemisphere contributions to linguistic processing emerge when stimuli are words, and when they are spoken with affective prosody.
Grimshaw
Gina M
GM
Department of Psychology, California State University San Marcos, San Marcos, CA 92096, USA. grimshaw@csusm.edu
Kwasny
Kristin M
KM
Covell
Ed
E
Johnson
Ryan A
RA
D000704:Analysis of Variance; D001307:Auditory Perception; D004007:Dichotic Listening Tests / Q000379:methods; D004292:Dominance, Cerebral / Q000502:physiology*; D005260:Female; D006801:Humans; D007802:Language; D008037:Linguistics; D008297:Male; D010153:Paired-Associate Learning; D010470:Perceptual Masking; D010700:Phonetics; D011578:Psycholinguistics; D011930:Reaction Time; D012660:Semantics; D013061:Speech Acoustics; D013067:Speech Perception; D013068:Speech Production Measurement; D011795:Surveys and Questionnaires; D013998:Time Perception