ABSTRACT
THE interest of Guilford and Cattell in trait as opposed to type factors resulted in the construction of numbers of multifactorial questionnaires which could not directly be used for the measurement of neuroticism and extraversion. In order to obtain questionnaire measures of these two factors for the investigation of the personality postulates discussed in the last section, Eysenck therefore found it necessary to try and construct inventories specially to fulfil this purpose. The first such inventory was the Maudsley Medical Questionnaire (Eysenck, 1952a), which is reprinted below. This was constructed to measure the personality trait of neuroticism and it succeeded in differentiating between normal and neurotic soldiers. Figure 8.1 shows the distribution of scores for these two groups; the scores of the neurotic group is roughly twice that of the normal group on the average, the respective means being 20·01 and 9·98. Also constructed was an 18-item lie scale which was frequently used in conjunction with the MMQ. Eysenck (1953) has shown some evidence for the validity of the lie scale by demonstrating that in a group of neurotic subjects the distribution of MMQ scores is bimodal, and that for those in the group having low MMQ scores the lie scores are significantly higher than in the other group. Item analyses were also carried out of the MMQ and some of the results have been reported in Eysenck (1952a, page 97). 1
