Dichotic ear effects with digits and tones: a within-subject comparison.
56 right-handed adults (23 men, 33 women) with IQs ranging from 79 to 140 on the Quick Test each performed on two dichotic tests, one with digital input, one with tonal input. The average magnitude of the right-ear advantage for digits was comparable to that of the left-ear advantage for tones, but there was greater between-subject variability with tonal input than with digital input. Ear advantage with digits was unrelated with ear advantage with tones, and high intelligence was not associated with clearly opposite directions of ear advantage for the two types of test material. The results were discussed in terms of hemispheric specializations, as well as the reliability and validity of the dichotic ear effects.
D000293:Adolescent; D000328:Adult; D001307:Auditory Perception; D004292:Dominance, Cerebral; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010898:Pitch Perception; D013067:Speech Perception