Zimmerman, M., & Coryell, W. (1987). The inventory to Diagnose Depression, Lifetime version. Acta Psychiatrica Scandinavica, 75(5), 495-499. doi:10.1111/j.1600-0447.1987.tb02824.x


Macalester College

IDDL is a measure developed for the assessment of a lifetime history of MDD, a more thorough version of IDD. IDDL is divided into 22 groups of five statements, arranged in decreasing severity. To determine the presence or absence of each symptom, a priori thresholds are devised.



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