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Problem-Solving Before Instruction PS-I: A Protocol for Assessment and Intervention in Students with Different Abilities

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Published on: September 11, 2021

The Personality Inventory for ICD-11: Investigating reliability, structural and concurrent validity, and method

Michael Carnovale¹, Martin Sellbom², R Michael Bagby²

¹Graduate Department of Psychological Clinical Science.

Psychological Assessment

|September 27, 2019

Summary

The Personality Inventory for ICD-11 (PiCD) shows good reliability and supports some personality disorder domains. Further research is needed to validate all its dimensions, especially Anankastia and Disinhibition.

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Area of Science:

Psychiatry
Psychology
Clinical Psychology

Background:

The International Classification of Diseases and Related Health Problems (ICD-11) introduces a new dimensional trait model for personality disorders.
The Personality Inventory for ICD-11 (PiCD) was developed to measure these five domains: Negative Affectivity, Detachment, Dissocial, Disinhibition, and Anankastia.
Limited research exists on the psychometric properties of the PiCD, necessitating further validation.

Purpose of the Study:

To evaluate the reliability, structural validity, concurrent validity, and method variance of the PiCD.
To examine the psychometric properties of the PiCD in a diverse undergraduate sample.

Main Methods:

The study utilized a sample of 518 ethnically diverse undergraduates.
Participants completed the PiCD and the Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2-RF).
Methods included internal consistency reliability analysis (coefficient categorical omega), exploratory structural equation modeling, random-intercept factor analysis, and concurrent validity analysis.

Main Results:

The PiCD domain scales demonstrated adequate internal consistency reliability (coefficient categorical omega = .77–.87).
Exploratory structural equation modeling supported a 4-factor solution, potentially indicating a bipolar continuum for Anankastia and Disinhibition.
Concurrent validity was supported for Negative Affectivity, Detachment, and Dissocial domains, with less support for Disinhibition and Anankastia when compared to MMPI-2-RF scales.

Conclusions:

The PiCD exhibits promising psychometric properties, particularly for the Negative Affectivity, Detachment, and Dissocial domains.
Further investigation into the psychometric properties and nomological network of the PiCD is recommended, especially for the Disinhibition and Anankastia domains.
The findings contribute to the validation of a new instrument for assessing personality disorder traits according to ICD-11 criteria.