Related Experiment Videos
Efficacy of the Mini-Mult validity scales with prisoners
Abstract:
The authors studied the ability of the Kincannon Mini-Mult validity scales to detect invalid standard MMPI protocols of adult male prisoners. The original MMPI records of 1407 Ss were rescored by use of Kincannon's items for the L, F, and K Scales. Analysis consisted of examining the frequency with which the Mini-Mult would detect an invalid protocol when at least one of the original MMPI validity scales also was elevated and invalid. Results indicate that the Mini-Mult failed to detect nearly 75% of the profiles that were invalid due to an elevated F scale on the parent MMPI. Similarly, over 50% of the profiles invalid due to elevated L and/or K scales were not detected by the Mini-Mult. Despite the appealing brevity of this 71-item short form of the MMPI, caution is advised with regard to its use in penal settings.
Insights
The Kincannon Mini-Mult scales struggle to identify invalid MMPI protocols in adult male prisoners. This short form missed a significant percentage of invalid profiles, questioning its reliability in forensic settings.
Area of Science:
- Forensic Psychology
- Psychometric Assessment
Background:
- The Minnesota Multiphasic Personality Inventory (MMPI) is a widely used psychological assessment tool.
- Validity scales are crucial for detecting response biases and ensuring the accuracy of MMPI results.
- The Kincannon Mini-Mult is a brief, 71-item short form of the MMPI, designed for efficiency.
Purpose of the Study:
- To evaluate the effectiveness of the Kincannon Mini-Mult validity scales.
- To determine the Mini-Mult's ability to detect invalid MMPI protocols in an adult male prisoner population.
- To assess the utility of this MMPI short form in forensic settings.
Main Methods:
- Rescoring of 1407 original MMPI records using Kincannon's L, F, and K scale items.
- Analysis focused on the Mini-Mult's detection rate of invalid protocols identified by the original MMPI validity scales.
- Comparison of Mini-Mult performance against established MMPI validity criteria.
Main Results:
- The Kincannon Mini-Mult failed to detect nearly 75% of MMPI profiles with an elevated F scale.
- Over 50% of profiles invalid due to elevated L and/or K scales were missed by the Mini-Mult.
- Significant underdetection of invalid protocols by the Mini-Mult in this forensic sample.
Conclusions:
- The Kincannon Mini-Mult demonstrates limited ability to detect invalid MMPI protocols in adult male prisoners.
- Caution is strongly advised when using the Mini-Mult in penal or forensic assessment contexts.
- The brevity of the Mini-Mult may come at the cost of essential validity detection capabilities.