Millon Adolescent Clinical Inventory (MACI)

Developed specifically for teens, the Millon Adolescent Clinical Inventory (MACI) evaluates concerns, demands, and conditions that teens encounter. For example, the MACI measure emotional patterns, clinical symptoms, and apprehensions in teen life. Common uses for this instrument are with psychologists, psychiatrists, juvenile justice professionals, and school mental health professionals.

Participants are asked to respond to 160 true/false items. Approximately 25 to 30 minutes is required for completing the test and it can be taken by paper-and pencil, CD, or with a computer. The recommended age for participants is 13 to 19 years old.

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Reliability and Validity

Reliability for the MACI, as reported by test manual, has good scores in most areas. Internal consistency alpha ranged from 0.73 to 0.91 for different scales. Over 3 and 7 day time periods, test-retest reliability scored between 0.57 and 0.92. The MACI showed good reliability for short periods, but would be more questionable with longer intervals. Individual’s responses in the MACI were correlated with the Beck Depression Inventory, Beck Hopelessness Scale, Beck Anxiety Inventory, and Eating Disorder Inventory revealing moderate data (few were above 0.35, most around 0.25).

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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.

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Davis, R. D. (1999). Millon: Essentials of his science, theory, classification, assessment, and therapy. Journal of Personality Assessment, 72, 330–352.

Kashani, J. H., Reid, J. C., Rosenberg, T. K., & Strober, M. (1988). Correlates of psychopathology in adolescents. Psychiatry Research, 26, 141–148.

Millon, T. (1993). The Millon Adolescent Personality Inventory and the Millon Adolescent Clinical Inventory. Journal of Counseling & Development, 71, 570.

Pryor, T., & Wiederman, M. W. (1998). Personality features and expressed concerns of adolescents with eating disorders. Adolescence, 33, 291–300.

Retzlaff, P., Sheehan, E., & Fiel, A. (1991). MCMI-II report style and bias: Profile and validity scales analysis. Journal of Personality Assessment, 56, 466-477.

Retzlaff, P., Sheehan, E., & Lorr, M. (1990). MCMI-II scoring: Weighted and unweighted algorithms. Journal of Personality Assessment, 55, 219-223.

Review of the Millon Adolescent Clinical Inventory. School of Medicine, University of Washington, Seattle, WA.