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Impulsivity: self-report and performance measure.

Summary. A sample of 98 boys, aged 11–12 years, completed the Junior Eysenck Personality Inventory and were individually administered Kagan's Matching Familiar Figures test of reflection/impulsivity. Four groups were formed on the basis of median splits on two indices of impulsivity and a two-way analysis of variance was carried out against Eysenck's personality dimensions and an additional impulsivity factor derived from the same inventory. The fact that no main effects or interactions were obtained for any self-report measure was discussed with reference to other failures to validate the JEPI.