Personality factors D, R, T, and A.

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Abstract
A set of 89 personality-questionnaire items was prepared with the intention of bringing out more clearly the primary traits or dimensions of rhathymia and of thinking introversion-extraversion that were indicated as probable primaries on the basis of previous thought and investigation. 30 of the items were intercorrelated, answers having been obtained from 1000 students. Thurstone's method of factor analysis was applied, and 9 primary factors were found. 7 of them were identified as: D (depression), R (rhathymia), S (shyness or seclusiveness), T (habitual thinking of a meditative sort), LT (liking for thinking of the problem-solving kind), and A (alertness). The seventh factor was identified with less assurance, but it seemed to suggest an immersion in the present environment as an observer. Significant correlations were found to exist between factors D, S, and T, which are thought to underlie the common conception of introversion-extraversion. Jung's original conception, however, is much closer to factor A than to D, S, and T. All other factors seem at present to be statistically independent. Evidence is given to validate the use of factor methods in the analysis of questionnaire items. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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