Desirability of old and new MMPI-2 items

Area of Science:

• Psychological assessment
• Personality testing
• Psychometrics

Background:

• The Minnesota Multiphasic Personality Inventory (MMPI) is a widely used psychological assessment tool.
• The MMPI-2 is an updated version with revised and new items.
• Understanding user perceptions of item desirability is crucial for test development.

Purpose of the Study:

• To compare desirability ratings between original MMPI items and new MMPI-2 items.
• To assess potential differences in user endorsement of older versus newer test content.
• To inform future revisions and interpretations of the MMPI-2.

Main Methods:

• Desirability ratings were collected for MMPI-2 items.
• Ratings for new MMPI-2 items were compared to ratings for original MMPI items.
• Different participant samples were used for rating old and new items.

Main Results:

• New MMPI-2 items showed significantly lower desirability ratings compared to original MMPI items.
• Endorsement rates were also lower for the new MMPI-2 items.
• The use of separate samples for old and new items introduces uncertainty in interpretation.

Conclusions:

• Initial findings suggest new MMPI-2 items may be perceived as less desirable than original MMPI items.
• The validity of these findings is limited by the use of non-identical samples.
• A study using a single sample to rate all MMPI-2 items is recommended for clearer conclusions.