Developed by Aaron T. Beck, M.D. in 1961, the Beck Depression Inventory (BDI) is a commonly used instrument for quantifying levels of depression.The scale for the BDI was originally created by patients’ descriptions of their symptoms – mood, pessimism, sense of failure, self-dissatisfaction, guilt, suicidal ideas, crying, irritability, social withdrawal, insomnia, fatigue, appetite, weight loss, self-accusation.In the first portion of the test, psychological symptoms are assessed whereas the second portion assesses physical symptoms.
BDI test includes a 21 item self-report using a four-point scale ranging which ranges from 0 (symptom not present) to 3 (symptom very intense.The test takes approximately 5 to 10 minutes to complete.There is a shortened version of the test consisting of 7 items intended to by used by primary care providers.
Validity and Reliability
The BDI test is widely known and has been tested for content, concurrent, and construct validity.High concurrent validity ratings are given between the BDI and other depression instruments as the Minnesota Multiphasic Personality Inventory and the Hamilton Depression Scale; 0.77 correlation rating was calculated when compared with inventory and psychiatric ratings.The BDI has also showed high construct validity with the medical symptoms it measures.Beck’s study reported a coefficient alpha rating of .92 for outpatients and .93 for college student samples.
Obtaining the BDI
Resources page at the Beck Institute website
References
American Psychiatric Association. (2000). Diagnostic and statistical manual of mental disorders (4th ed.). Washington, D.C.: American Psychiatric Association.
Beck, A. T., & Steer, R. A. (1984). Internal consistencies of the original and revised Beck Depression Inventory. Journal of Clinical Psychology, 40, 1365-1367.
Beck, A. T., Steer, R. A., Ball, R., & Ranieri, W. (1996).Comparison of Beck Depression Inventories-IA and –II in psychiatric outpatients. Journal of Personality Assessment 67(3), 588-97.
Beck, A. T., Steer, R. A., & Garbin, G. M. (1988). Psychometric properties of the Beck Depression Inventory: Twenty-five years of evaluation. Clinical Psychology Review, 8, 77-100.
Sharp, L. K., & Lipsky, M. S. (2002). Screening for depression across the lifespan: A review of measures for use in primary care settings. American Family Physician, 66(6), 1001-1008.
Teri, L. (1982).The use of the Beck Depression Inventory with adolescents. University of Oregon. Journal of Abnormal Child Psychology 10(2), 277-84.
