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Abstract

Humphreys (1989) hypothesized that psychometric g is more highly correlated with the number of response errors on elementary cognitive tasks than with the reaction time (RT) measures themselves. Although Humphreys' hypothesis may well hold for relatively complex RT tasks, results of a recent study do not substantiate his hypothesis with regard to some of the simplest tasks. In this study, the average correlation (r) between g and number of response errors was .05, compared to -.20 for median RT and -.23 for intraindividual differences in RT (measured as the standard deviation of RTs over trials). Even after correction for attenuation, the average r between g and errors is lower (.02) than the average correlations between g and the RT measures.

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Reaction Time,Response Errors,and G

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References