The Wechsler adult intelligence scale and personality assessment: Towards a biologically based theory of intelligence and cognition

Drawing on findings reported in an earlier paper (Robinson, 1985a), ‘introversion- extraversion’ scores were derived from WAIS-R profile differences. Scores on a ‘psychopathy’ dimension were derived from WAIS-R profiles in similar fashion. Results are described which show that these WAIS-R scores do relate to personality in the predicted fashion. The essential findings are that groups with high and low WAIS-R introversion-extraversion scores obtain significantly different scores on the Extraversion scale of the EPO. Groups with high and low WAIS-R psychopathy scores obtain significantly different scores on the Psychoticism scale of the same questionnaire. Some theoretical and practical implications are discussed. Special reference is made to biologically based explanations for ‘intelligence’ differences and differences in ‘cognition’.