Intrahemispheric response competition between vocal and unimanual performances in normam adult human males.
Subjects balanced a dowel rod vertically on the left and right index finger singly and while simultaneously repeating phrases. With right-handed subjects who had no left-handed relatives, concurrent verbalization shortened right- but not left-handed balancing. Increased phonetic difficulty of the phrases produced an increased decrement on right-handed balancing, but left-handed balancing was unchanged; it also produced more verbalization errors on trials with the right hand, but not with the left. Concurrent verbalization shortened balancing duration with both hands of left-handers. Right-handers with left-handed relatives produced variable results. Concurrent humming also selectively interfered with right-handed balancing. It was concluded that the results conform to an interpretation based on intrahemispheric interference between incompatible, simultaneously produced sets of responses.
D000328:Adult; D004292:Dominance, Cerebral; D007839:Functional Laterality; D006579:Heterozygote; D006720:Homozygote; D006801:Humans; D007257:Information Theory; D008297:Male; D009048:Motor Skills; D010470:Perceptual Masking; D013997:Time Factors; D014705:Verbal Behavior