Minnesota Multiphasic Personality Inventory (MMPI-2). Presentation by Larrah Selby & Sandi Colvin CNED 5303. Publisher. University of Minnesota Press Distributed by Pearson Assessments (formerly known as National Computer Systems Assessments, NCS) www.pearsonassessments.com. Background.
Minnesota Multiphasic Personality Inventory (MMPI-2)
Larrah Selby & Sandi Colvin
Five major validity scales
Variable Response Inconsistency (VRIN)
True Response Inconsistency (TRIN)
Examples of Clinical Scales
Psychopathic Deviate (Pd)
Source of much debate/controversy
Raw scores are translated into T scores with a mean of 50 and a standard deviation of 10
T score of 65 or higher is interpreted as pathology
(L) Scale and (F) Scale = raw score of 4 is mean, t score is 50
TRIN Scale – scores <6 and >12 suggest inconsistent responding – a t score of >80 suggests profile invalidity
VRIN Scale = a t score of >80 suggests inconsistent responding and profile may be invalid
Normative sample consists of 1,138 males and 1,462 females between the ages of 18 and 84 from several regions and diverse communities within the U.S.
From six states and included active duty military personal, college students, inpatient psychiatric patients, chronic pain patients, inpatient substance abuse patients, airline pilot applicants, and Native American adults on a federal reservation in Washington state
Ethnicity data: Men = 11% African American, 84% Caucasian, 3% Hispanic, and 2% other
Women = 13% African American, 82% Caucasian, 3% Hispanic, and 2% other.
50% of males and 42% of females in the restandardization group reported a bachelor’s degree or higher compared to 1980 census data of 20% males and 13% of females
20% of males and 13% of females reported professional occupations compared to census data of 16%
Content Scales are face valid
If test taker leaves more than 30 items unanswered, then the test is considered invalid and should not be interpreted.
Validity scales should be within normal limits
Validated against various samples of individuals with mental illness
Criterion group method of inventory construction
The validity of the revised scales has not been thoroughly established in clinical settings
Most widely used and researched personality inventory
Some reasons respondants might omit an item or items on the validity scale:
Item is considered offensive or personal
Obsession or overideation resulting in indecisiveness
Severe psychomotor retardation resulting in insufficient energy to complete the task
Desire to look good
Lack of trust in the examiner
The different formats are made available to reach as many persons as possible: blind, illiterate, learning disabled, different languages, etc.
Has Scales that detect if test taker is responding in a socially desirable way or faking (K scale)
Backed by extent of empirical research
Has depression scale and anxiety scale in same test – first personality inventory to do so
And now for some fun……..
Craig, R. J. (1999). Interpreting personality tests: A clinical manual for the MMPI-2, MCMI-III, CPI-R, and 16PF. New York: John Wiley & Sons, Inc.