Morris B. Parloff, 92, an authority of psychotherapy research who spent 30 years at the National Institute of Mental Health before retiring as a branch chief in 1983, died April 2 at a hospital in Teaneck, N.J., of respiratory failure.

After retiring from NIMH, Dr. Parloff opened a private clinical practice and became an adjunct professor at American University.

During his career, he also lectured at, consulted for or was on the faculty of such institutions as the Washington School of Psychiatry, the University of Maryland, Georgetown University School of Medicine and Walter Reed Army Medical Center.

His professional honors included the Public Health Service Superior Service Award. He was a life fellow of the American Psychological Association, a distinguished fellow of the American Group Psychotherapy Association and a past president of the Society for Psychotherapy Research.

Morris Bernard Parloff was a Cleveland native. He was a 1940 psychology graduate of what is now Case Western Reserve University in his home town, where in 1953 he also received a doctorate in clinical psychology. He received a master’s degree in psychiatric social work from the University of Chicago in 1942.

During World War II, he did counterintelligence work with the Army in Europe. Fluent in German, he led a unit of German-Jewish refugee soldiers known as the “Ritchie Boys,” named after the Maryland-based intelligence school where they were trained. He appeared in the 2004 documentary “The Ritchie Boys.”

He moved to Teaneck from Bethesda in 2005.

Survivors include his wife of 68 years, Gloria Harnick Parloff of Teaneck; two sons, Michael L. Parloff of Ridgewood, N.J., and Roger H. Parloff of Closter, N.J.; and a grandson.

— Adam Bernstein