| Abstrakt: |
Previous experimental work has suggested that bilateral reaction times to visual stimuli may be subject to dominance effects, and that where pairs of stimuli are closely ordered in time, these effects may be more complex than a simple superiority in speed of performance by the dominant hand. Twenty subjects, ten markedly left handed and ten markedly right handed, were selected from a larger group of forty-four subjects to examine these effects in detail. Results showed: For single responses and paired responses to simultaneous stimuli, responses by the dominant hand were made significantly faster than by the non-dominant hand., A reversal of this effect occurred with the second responses to paired stimuli which were separated by an interval of 100 msec., the dominant responses being made significantly more slowly than the non-dominant responses., This reversal was a feature of the delayed responses only, i.e. of those responses where reaction time to the second stimulus was lengthened following a response to the first stimulus. Where the response to S2 was not delayed, dominance effects were in the same direction as for the single responses., A subsidiary finding was that, apart from the relative magnitudes of response times, types of response to paired stimuli showed some relationship to individual dominance. In particular the response to S2 was more often delayed in the stimulus order non-dominant/dominant than in the opposite order and responses were more often made independently in the order dominant/non-dominant. [ABSTRACT FROM AUTHOR] |
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