Some Methodological Problems in Reflection-Impulsivity Research

Abstract

AULT, RUTH L.; MITCHELL, CHRISTINE; and HARTMANN, DONALD P. Some Methodological Problems in Reflection-Impulsivity Research. CmLD DEVELOPMENT, 1976, 47, 227-231. 2 statistical characteristics of the Matching Familiar Figures test produce methodological problems in reflection-impulsivity research. The first characteristic is low reliability of error rates which results in 4 problems: frequent errors of classification, regression effects in repeatedmeasures designs not employing a control group, statistically insignificant effects in small sample studies when error rate is manipulated, and underestimation of correlations between errors and other variables unless corrected for attenuation. The second characteristic is the moderate negative correlation between latency and error rate which makes 2 X 2 analyses of variance on latencies and errors problematic. The main and interaction effects resulting from such an analysis may be confounded, and artificial dichotomization of continuous variables such as latency and errors results in loss of statistical power.

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