High Quality Content by WIKIPEDIA articles! Thomas A. Widiger is currently a faculty member at the University of Kentucky in the Department of Psychology. His research interests are concerned generally with the diagnosis and classification of psychopathology. He is more specifically interested in the validity of the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders (DSM-IV); dimensional models of personality disorder; assessment of personality disorders with self-report inventories, unstructured clinical interviews, and semi-structured clinical interviews; gender biases in the diagnosis of mental disorders; the relationship of personality to psychopathology; and the differentiation of normal from abnormal psychological functioning. He will typically have anywhere from four to eight graduate students, and one undergraduate honor’s thesis student, completing either their thesis or dissertation within his lab.