A psychometric investigation of the eysenck personality questionnaire (revised) and its relationship to the I.7 impulsiveness questionnaire

The present study investigated the psychometric properties of the Eysenck Personality Questionnaire-Revised (EPQ-R) and the I.7 Impulsiveness Questionnaire. 307 Ss (215 female, 92 male) completed the EPQ-R and the I.7. Scale means and the standard deviations were calculated, scale reliability tested, scale scores intercorrelated and the resulting matrices were factor-analysed. The items from the EPQ-R and the I.7 were submitted to an item factor analysis. The results of the present study were quite similar to those reported by Eysenck, Eysenck and Barrett (1985) for the EPO-R and those reported by Eysenck, Pearson, Easting and Allsopp (1985) for the I.7. It was concluded that the EPQ-R represents an improvement on the 90-item EPQ and that the I.7 represents an adequate and reliable measure of Impulsiveness, Venturesomeness and Empathy. The relationships between the EPQ-R factors and the I.7 factors are also discussed.