A Response to Odland et al.'s Misleading, Alarmist Estimates of Risk for Overpathologizing when Interpreting the MMPI-2-RF
Anthony M Tarescavage1, Yossef S Ben-Porath
1a Department of Psychological Sciences , Kent State University , Kent , OH , USA.
Abstract:
In a recently published article in this journal, Odland, Lammy, Perle, Martin, and Grote report Monte Carlo-simulated normative base rates of scale elevations on the Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2-RF). Their primary conclusion--reflected in the title of their article--is that MMPI-2-RF interpretation is associated with "high risk of pathologizing healthy adults" when the 40 substantive scales of the test are simultaneously interpreted. In this paper, we describe how their conclusion follows from several faulty premises, three of which were already debunked in an earlier article and remain false despite counterarguments proposed by Odland and colleagues. We also address these authors' misinterpretation of their analyses and, furthermore, their premise that MMPI-2-RF interpretive guidelines are flawed because they "currently do not account for a basic statistical principle: Type I (or alpha) error inflation" (p. 1). This premise is irrelevant to psychological test interpretation and misaligned with neuropsychological testing literature cited in support of it. Consistent with suggestions by some of the authors they cite, we reiterate MMPI-2-RF interpretive guidelines designed to mitigate the impact of measurement error (not alpha error) by way of a scientific assessment approach that relies on integration of information derived from multiple sources.
Insights
This study refutes claims that interpreting the Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2-RF) risks pathologizing healthy adults. It clarifies that the original analysis contained flawed premises and misinterpretations of statistical principles.
Area of Science:
- Psychological Assessment
- Personality Testing
- Psychometrics
Background:
- A recent article suggested that simultaneous interpretation of the Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2-RF) scales risks pathologizing healthy individuals.
- This conclusion was based on Monte Carlo simulations of normative base rates for scale elevations.
- The authors of the recent article posited that MMPI-2-RF interpretive guidelines are flawed due to not accounting for Type I error inflation.
Purpose of the Study:
- To critique the methodology and conclusions of a recently published article concerning MMPI-2-RF interpretation.
- To address faulty premises and misinterpretations presented in the aforementioned article.
- To reaffirm the validity of existing MMPI-2-RF interpretive guidelines.
Main Methods:
- Re-evaluation of the premises underlying the Monte Carlo simulations reported by Odland et al.
- Debunking of previously refuted arguments and addressing counterarguments presented by Odland et al.
- Analysis of the relevance of Type I error inflation to psychological test interpretation.
Main Results:
- The conclusion that MMPI-2-RF interpretation carries a high risk of pathologizing healthy adults is based on faulty premises.
- Several of these premises were previously debunked and remain unsubstantiated.
- The argument regarding Type I error inflation is irrelevant to psychological test interpretation and misaligned with relevant literature.
Conclusions:
- The critique of MMPI-2-RF interpretation by Odland et al. is based on flawed reasoning and misapplication of statistical concepts.
- Existing MMPI-2-RF interpretive guidelines are designed to mitigate measurement error, not alpha error.
- A scientific assessment approach integrating multiple information sources remains the recommended practice for MMPI-2-RF interpretation.
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