Rationale: Rodriguez-Perez et al. (2021) explain that the Beck Depression Inventory (BDI-IA) is the most widely used measurement available for the assessment of clients' depressive symptoms.

 

How it measures depression: Client self-report by filling out a 21-item questionnaire, with multiple choices scoring from a 0 to a 3.

 

Validity: In a study of 2,022 subjects, Rodriguez-Perez et al. (2021) found a Cronbach's alpha coefficient of .91.

 

Reliability: In their research, Rodriguez-Perez et al. (2021) found that Beck's Depression Inventory rendered 

internal consistency coefficients from .76 to .95, as well as (r) test-retest coefficients from

.48 to .86.

 

Responsiveness, Sensitivity to Change: Rodriguez-Perez et al. (2021) found the BDI to rate at 85.5% sensitivity

 

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Rodríguez, Victor & Menéndez, Alicia & Ramirez-Renteria, Claudia & Marín, José. (2021). Beck Depression Inventory (BDI-IA) adapted for HIV: Psychometric properties, sensitivity & specificity in depressive episodes, adjustment disorder & without symptomatology. Salud mental. 44. 287-294. 10.17711/SM.0185-3325.2021.037.