Visual temporal asymmetries are related to asymmetries in linguistic perception.
There are numerous recent reports of low-level temporal asymmetries favouring the left hemisphere, and increasing speculation that the left hemisphere's relative superiority at linguistic processing may be related to these asymmetries. The present study sought to test this claim by assessing linguistic lateralization with the Fused Dichotic Words Test and visual temporal asymmetries with a lateralized version of an inspection-time test in a sample of 40 participants balanced for sex and handedness. We found evidence for a significant right-visual-field (left-hemisphere) advantage for accuracy on the inspection-time task, F(1,36)=4.38, P = 0.043, and this asymmetry was significantly correlated with laterality scores on the linguistic dichotic-listening task, r = 0.306, P < 0.028 before disattenuation, and r = 0.486 after disattenuation. This result supports the position that low-level temporal asymmetries are related to asymmetries in linguistic processing.
Elias
L J
LJ
Department of Psychology, University of Saskatchewan, Saskatoon, Canada. Lorin.Elias@Usask.ca
Bulman-Fleming
M B
MB
McManus
I C
IC
D000328:Adult; D002540:Cerebral Cortex / Q000502:physiology*; D004292:Dominance, Cerebral / Q000502:physiology*; D005260:Female; D005556:Form Perception / Q000502:physiology; D006801:Humans; D008297:Male; D016017:Odds Ratio; D010470:Perceptual Masking / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D013067:Speech Perception / Q000502:physiology*; D013223:Statistics as Topic; D013997:Time Factors; D013998:Time Perception / Q000502:physiology*; D014794:Visual Fields / Q000502:physiology