In a continuation of previous experiments, choice reaction times were measured for a key-pressing response to natural utterances of the word pairs /splei-sprei/ and /leirei/. Stimuli were presented monaurally and data were obtained from 24 right-handed subjects and 8 left-handed subjects, each of whom responded to both word pairs and with each ear. A highly significant right ear advantage was shown by the right-handed subjects in processing /splei-sprei/, the difference in the mean reaction time being 27 msec. but the same group of individuals showed no ear advantage in processing /leirei/. The left-handed subjects gave no significant ear advantage in the case of either word pair.
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