Mapping Grayʹs model of personality onto the Eysenck Personality Profiler (EPP)

The aim of this study was to determine how well Grayʹs model of personality [Gray, J.A. (1982). The neuropsychology of anxiety: an enquiry into the functions of the septo-hippocampal system. Oxford: Oxford University Press; Gray, J.A. (1987). The psychology of fear and stress. Cambridge: Cambridge University Press], as measured by the Gray–Wilson Personality Questionnaire (GWPQ), can provide a full description of personality as measured by the primary scales of the Eysenck Personality Profiler (EPP) and the type scales of the short version of the EPQ-R. Factor analysis of the GWPQ, the Anxiety and Impulsivity scales of the EPP and the Learning Styles Questionnaire (LSQ) showed that the GWPQ seemed to measure general activation and inhibition factors, but not the finer features of Grayʹs theory. When the GWPQ scales were regressed against each scale of the EPP, it was found that they generally provide only a reasonable explanation of the EPP primary scales. It is concluded that the GWPQ measures general properties of Grayʹs model, that the Impulsivity and Anxiety scales of the EPP also seem related to the GWPQ scales, and that Grayʹs model of personality provides only a partial explanation of personality in general.