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Individual differences |
Methods | Statistics | Clinical | Educational | Industrial | Professional items | World psychology |
The California Psychological Inventory (CPI) is a self-report inventory created by Harrison Gough and currently published by Consulting Psychologists Press. It was created in a similar manner to the Minnesota Multiphasic Personality Inventory (MMPI), but unlike the MMPI, it is not concerned with malajustment or clinical diagnosis, but concerned itself with more "normal" aspects of personality. 
The CPI is made up of 480 true-false questions, half of which were taken from the original version of the MMPI.  The test is scored on 18 scales, three of which are validity scales. Eleven of the non-validity scales were selected by comparing responses from various groups of people. The other four were content validated. 
The test is typically used with people aged 13 years and older. It takes about 45-60 minutes to complete.
The revised third edition of the CPI contains 434 items.
The inventory contains 434 items which can be scored to yield 18 scales. The 18 scales are further grouped into four classes:
- (1) measures of poise, ascendancy, self-assurance, and interpersonal adequacy;
- (2) measures of socialization, responsibility, intrapersonal values, and character;
- (3) measures of achievement potential and intellectual efficiency;
- (4) measures of intellectual modes and interest modes. 
Correlations between CPI scales and related external criteria tend to fall in the .2 to .5 ranges. This degree of correlation is typical for much of personality research. Extremely high correlations are not likely to be found for personality measures because the scales typically try to assess rather broad behavioral tendencies. 
Norms are available for males only, females only, and male/female data combined. The CPI has been very popular in research and in individual assessments of adolescents and adults. The fact that it was developed and normed on non-psychiatric or non-clinical populations is regarded almost universally as part of its positive reputation and usefulness among psychologists.
- ↑ 1.0 1.1 1.2 Aiken, L.R. (2004)"Psychological Testing and Assessment." New York:Allyn and Bacon.
- ↑ 2.0 2.1 Gough,H.G. & Bradley, P. (1996). "CPI Manual." Ed.3. Palo Alto, CA: Consulting Psychologists Press.
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