Abstract
The purpose of the present investigation was to examine the specificity versus generality of motor response consistency. 30 right-handed college males were given 200 RT trials a day for 8 days: 4 days on a simple RT task (100 trials per day with the left hand and 100 trials per day with the right hand) and 4 days on a choice RT task (again 100 trials per day with each hand). Thus, 4 RT measures were obtained for each S over 4 test days: simple RT left hand, simple RT right hand, choice RT left hand and choice RT right hand. The reliability of motor response consistency was high for all RT measures, the average rs being .797, .830, .780, and .793 for Days 1, 2, 3, and 4 respectively. There was evidence for a moderate general factor between two pairs of measures (the average correlation for left correlated with right hand in simple RT and left correlated with right hand in choice RT was .620 raw and .800 when corrected for attenuation). However, in general, the correlations reflected high task specificity even when corrected for attenuation (average correlation for the remaining pairs of measures was .325 uncorrected, .434 corrected).
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