Synapl.
BDI-IIDepressionpaid

Beck Depression Inventory-II

Classic 21-item self-report measure of depression severity.

FDA

Overview

A 21-item self-report instrument measuring the severity of depression in adolescents and adults, revised to align with DSM-IV criteria.

Use cases

Outcome measure in antidepressant trials and psychotherapy research.

Assessment intelligence

Score range
0 – 63
Direction
Higher = worse
Scoring method
Sum
Time to score
~2 min
Subscales
  • Total Depression
    0-63

    Sum of 21 items rated 0-3.

Cutoff thresholds & interpretation
SeverityThresholdInterpretation
Minimal0-13Minimal depression
Mild14-19Mild depression
Moderate20-28Moderate depression
Severe29-63Severe depression

Widely used outcome measure in depression trials.

Editorial notes

Internal consistency alpha 0.92 in outpatients; strong convergent validity with HAM-D.

Available languages

EnglishSpanishFrenchGermanJapaneseMandarin ChinesePortugueseItalian

Validation studies (2)

Related assessments

PHQ-9
Patient Health Questionnaire-9

Gold-standard nine-item depression severity self-report.

HAM-D
Hamilton Depression Rating Scale

Clinician-rated depression severity, the historical trial standard.