Relationships between the Eysenck Personality Inventory N Score, the Cornell Medical Index M-R Score, and the Psychogalvanic Reflex

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Abstract
A comparison of the N score of the Eysenck Personality Inventory and the M-R score of the Cornell Medical Index, as yardsticks to measure personality traits, was attempted in a group of 97 patients all of whom had had a myocardial infarction. It was found that the correlation coefficient between these two scores was +0.679 and that they were different in their distribution. The implications are discussed. The relationships of the Eysenck Personality Inventory N score and the Cornell Medical Index M-R score with the psychogalvanic reflex (PGR) changes in response to a standard stress test were also determined in a smaller group of subjects. It was found that the PGR changes were significantly and positively related to the N and M-R scores. But the correlation coefficients were not high. The implications of this are discussed. It is suggested that PGR, N score and M-R score measure constitutional neuroticism, phenotypic neuroticism and neurotic symptoms respectively. The plea is made that more studies are required to find out the relationship between scores on personality questionnaires and autonomic responsiveness.