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Validation of the Multidimensional Inventory of Dissociation-60 (MID-60) Items in a Clinical Population
Journal article   Open access   Peer reviewed

Validation of the Multidimensional Inventory of Dissociation-60 (MID-60) Items in a Clinical Population

Mary-Anne Kate, Hannah Swinfield, David L. Hegarty, Benjamin Buchanan and Martin J Dorahy
Assessment, Vol.First online, pp.1-21
04/08/2026
DOI: https://doi.org/10.1177/10731911261462453
Appears in  Recent Faculty of Health Publications
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Validation of the Multidimensional Inventory of Dissociation-60 (MID-60) Items in a Clinical PopulationView
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Abstract

dissociation Multidimensional Inventory of Dissociation-60 psychometric validation confirmatory factor analysis clinical assessment
The Multidimensional Inventory of Dissociation-60 (MID-60) was validated in adults in clinical care using data from 13,177 de-identified assessments on an Australian online psychometric platform. Analyses used subsamples defined by available measures for factor, reliability, and validity testing. Confirmatory factor analysis supported the intended 11-factor structure, with good conventional fit and acceptable robust fit after correction for non-normality. Internal consistency (α = .98) and short-interval test–retest reliability were high. The MID-60 converged strongly with the Dissociative Experiences Scale II (DES-II; r = .80) yet was able to identify milder clinical presentations that the DES-II cut-off often misses. Convergence with the International Trauma Questionnaire (r = .64) and graded associations with the World Health Organization Disability Assessment Schedule 2.0 (r = .50) supported links to trauma symptoms and disability. MID-60 scores decreased over repeated administrations of 2 to 12 months. Findings confirm the MID-60 as a reliable, valid, and clinically sensitive measure for screening, formulation, and progress monitoring.

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