Correlations of extraversion,impulsivity and sociability with sensation seeking and MBTI-introversion

Three samples of undergraduates completed the Eysenck Personality Inventory (EPI), Sensation Seeking Scale (SSS), Myers-Briggs Type Indicator-Introversion scale (MBTI-I), and, in one sample, the Eysenck Personality Questionnaire (EPQ). As predicted, the correlation of EPI-Soc with MBTI-I was significantly and consistently larger than that for EPI-Imp; however, the tendency for EPI-Imp to have a larger correlation than EPI-Soc with SSS was not significant. Impulsivity and Sociability exhibited similar correlations with EPI-E, but Sociability had a significantly higher correlation with EPQ-E than did Impulsivity. Results demonstrate both the differential utility of Impulsivity and Sociability and the evolving nature of the EPI and EPQ measures of Extraversion.