The reliability of the CPI has been assessed as to its internal consistency, as judged by alpha (.77 median) and test-retest (medians: 1 year=. The scales were developed from an initial normative sample consisting of six thousand men and seven thousand women, which while not constructed through random selection, nonetheless captured a comprehensive cross-section of society. Upon scoring, the test produces measurements along 20 “folk” scales of character, along the lines of Weberian prototypical exemplars.Īfter interpretation, these scores are used to classify subjects as either: The standard 434 question test is administered in 45 to 60 minutes in true-false format and is similar in design to the MMPI. Originally developed in 1957 by Harrison Gough, the California Psychological Inventory (CPI) is a leading non-clinical personality inventory test that evaluates interpersonal behavior and social interaction of normal individuals.
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