Psychometric models for indirect and direct items for the Canadian Armed Forces Recruit Mental Health Services Use Questionnaire – Factor analytic, formative, and combined models with data from the Group Randomized Control Trial of the Road to Mental Readiness Program

  1. Falk, C.
Corporate Authors
Defence Research and Development Canada, Toronto Research Centre , Toronto ON (CAN);McGill Univ, Montreal QUE (CAN)
In this report, we primarily discuss possible measurement models for the Mental Health Services Use Questionnaire (MHSUQ), which was developed using a theoretical approach stemming from the theory of planned behaviour (TPB) and contains both direct and indirect items of Attitudes, Self-Efficacy, and Perceived Behavioural Control. Previous analyses have focused primarily on direct items, and here we concentrate mostly on indirect items. Seven different confirmatory factor analysis models and three formative measurement models are proposed for the indirect items. The possibility of combining both indirect and direct items is briefly covered, as well as the theoretical advantages/disadvantages of both types of approaches. Experts on TPB have typically preferred formative measurement models for indirect items, yet some examples in the literature have successfully used confirmatory factor analysis. It is suggested that the indirect items on the MHSUQ may actually follow a traditional confirmatory model, but due to content heterogeneity such a model may be difficult to distinguish from a formative model. Further refinement of the proposed models must rely on substantive theory, exploratory analyses, or some combination of both. In addition, we propose two possible estimation approaches for handling both missing data and possible aberrant responses (e.g., random responding), and touch on assessment of model fit and model modification.

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Attitude Change;Mental Health and Resiliency
Report Number
DRDC-RDDC-2019-C075 — Contract Report
Date of publication
01 Apr 2019
Number of Pages
Electronic Document(PDF)

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