Abstract

BAPTISTA, Makilim N. et al. Internal structure analysis of the major depression inventory (MDI). Psicol. teor. prat. [online]. 2020, vol.22, n.1, pp. 22-40. ISSN 1516-3687.  http://dx.doi.org/10.5935/1980-6906/psicologia.v22n1p22-40.

The objective of the study was to evaluate the psychometric qualities of the Major Depression Inventory (MDI). The MDI was applied to 714 university students and 12 people diagnosed with depression. Internal structure analyses were performed using TCT and IRT, as well as reliability, sensitivity, and specificity. The one-dimensional solution was the most coherent theoretically and the parameters via suitable TCT, with a reliability of 0.89. Already, via IRT, not all appropriate parameters were respected, such as infit and outfit indexes, as well as categories of non-discriminative responses. Accuracy indexes also showed limitations, especially concerning false negatives (specificity of 63.9). Thus, it is suggested to perform new studies analyzing the data via IRT, as well as a larger clinical group, diagnosed with a standard structured interview.

Keywords : depressive symptomatology; college students; psychometric properties; IRT; depression.

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