Accession Number : AD0615206

Title :   NOTE OF CAUTION ON THE FACTOR ANALYSIS OF THE MMPI,

Corporate Author : SYSTEM DEVELOPMENT CORP SANTA MONICA CALIF

Personal Author(s) : Shure,Gerald H. ; Rogers,Miles S.

Report Date : 15 FEB 1964

Pagination or Media Count : 5

Abstract : Although the dangers associated with factoring test scales containing overlapping items (items used on more than 1 scale) have been pointed out by Guilford (1952), factor studies of scales embodying item overlap continue. The present study explores the possibility that the neurotic triad and the psychotic triad or tetrad factors found in 4 studies derive from the existence of a methodological artifact associated with item overlap. To test this possibility, MMPI interscale common-element correlations (Produced solely by item overlap) were factor analyzed. 2 or 3 factors extracted are highly similar to neurotic triad and psychotic triad or tetrad factors found for 4 samples. These 2 factors do not appear in a factor analysis of truncated (overlap items removed) MMPI scale scores. Since the overlap factors are based solely on the scale intercorrelations due to overlap items, these results appear to support Guilford's warning and open to question the legitimacy of these MMPI factors. (Author)

Descriptors :   (*FACTOR ANALYSIS, PSYCHOLOGICAL TESTS), (*PSYCHOLOGICAL TESTS, PERSONALITY), (*PERSONALITY, PSYCHOLOGICAL TESTS), CORRELATION TECHNIQUES, RELIABILITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE