This study compared 143 subjects' scores (aged 17 to 51 yr.) on three measures designed to assess preference for situations requiring being sociable and outgoing or those associated with being more quiet and withdrawn. Subjects' scale scores on the Introversion-Extroversion scale of the Strong-Campbell, the Social Introversion scale of the MMPI and the Affiliation scale of the Personality Research Form were compared. Pearson product-moment correlations were significant, but moderately low (rs = —.29 to .41) between pairs of measures.
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