California Psychological Inventory (CPI)

The California Psychological Inventory assesses social communication and interpersonal behavior.  Specifically, predicting an individual’s reaction, what they will say or do, under conditions is part of the purpose of the CPI. Also, the CPI shows how others will view and assess this individual.

Participants are required to respond to 434 items self-report test.  Approximately 45 to 60 minutes is necessary for completion and the test can be done with a computer or pencil-and-paper.

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Reliability and Validity

According the CPI test manual, extensive data was given and reliability/validity scores were varied.  Alpha ratings for internal consistency ranged from 0.43 to 0.85 for the 20 folk scales, but the median score was 0.76.  For the 3 Vector Scales, the alpha ratings were 0.77 to 0.78 and for the 13 specialty scales, it was 0.45 to 0.88 (median above 0.70).  Empirical evidence showed that reasonable to high correlations, 0.4 to 0.8, for the Folk and Vector scale with other personality instruments.   No inter-correlations or factorial analyses were conducted in the test manual.

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Administration, Analysis and Reporting

Statistics Solutions consists of a team of professional methodologists and statisticians that can assist the student or professional researcher in administering the survey instrument, collecting the data, conducting the analyses and explaining the results.

For additional information on these services, click here.

Dissertations Using the California Psychological Inventory

Below is a list of dissertations that use the CPI.  The full version of these dissertations can be found using ProQuest.

Hooper, R. T. (1994). The relationship between nurses moral reasoning and personal autonomy. University of Minnesota).

Graf, E. R. (1992). Relationship of external-rated job performance to nurse self-perceived performance and self-competence. Virginia Commonwealth University).


Aiken, L.R. (2004) “Psychological Testing and Assessment.” New York: Allyn and Bacon. View

Block, J. (1961). The Q-sort method in personality assessment and psychiatric research. Springfield, IL: Charles C. Thomas. View

Briggs, S. R. (1992). Assessing the five-factor model of personality description. Journal of Personality, 60, 253-293.

Compton, W. C. (1998). Measures of mental health and a five factor theory of personality. Psychological Reports, 83, 371-381.

Gough, H.G. (1987) California Psychological Inventory Administrator’s Guide. Palo Alto, CA: Consulting Psychologists Press, Inc. View

Gough,H.G. & Bradley, P. (1996). “CPI Manual.” Ed.3. Palo Alto, CA: Consulting Psychologists Press.

Gough, H.G. (1987). California Psychological Inventory Administrator’s Guide. Palo Alto, CA: Consulting Psychologists Press, Inc.

Thorndike, R. L. (1959). In O. K. Buros (Ed.), The fifth mental measurements yearbook (pp. 97-99). Highland Park, NJ: The Gryphon Press. View