Janet B. W. Williams

Janet B. W. Williams
Born	(1947-11-15)November 15, 1947
Nationality	American
Alma mater	Tufts University (BS), University of Massachusetts Dartmouth (MS), Columbia University (MS, PhD)
Known for	Modernizing the classification of mental disorders, and the evaluation of psychopathology
Spouse	Robert Spitzer ​ (died 2015)​
Children	3
Scientific career
Fields	Psychiatry, Social Work
Institutions	Columbia University

Janet B. W. Williams (born November 15, 1947) is an American social worker who focuses on the diagnosis and assessment of mental disorders. She is Professor Emerita of Clinical Psychiatric Social Work (in Psychiatry & Neurology) at Columbia University. She was a major force in writing the PHQ-9, a 9-question instrument given to patients in a primary care setting to screen for the presence and severity of depression.^[1]