Louis Wienckowski, 83, who retired in 1983 as director of extramural research at the National Institute of Mental Health, died of renal failure Aug. 2 at Shady Grove Adventist Hospital in Rockville. He was a Rockville resident.

Dr. Wienckowski's last job put him in charge of funding outside research that NIMH sponsored.

In 1975 and 1976, he was a special consultant to the World Health Organization's Office of Mental Health in Geneva, where he also served on the special advanced board for the WHO international study of schizophrenia.

Dr. Wienckowski, a native of Buffalo, was an Army Air Forces veteran of World War II. He was a 1951 graduate of the University of Buffalo, where he also earned a doctorate in psychology in 1959.

Between degrees, he began working as a research associate at the human research office of George Washington University in 1954, and two years later he joined the NIMH staff.

Among his awards was a distinguished service award in 1975 for supporting federal equal opportunity for women.

Dr. Wienckowski was a fellow with the American Association for the Advancement of Science, the American Psychopathological Association, the American Psychological Association and the American Orthopsychiatric Association.

His memberships included the American College of Neuropsychopharmacology, the Society of Behavioral Medicine and the editorial advisory board of the Schizophrenia Bulletin.

He was a member of Our Lady Queen of Poland Catholic Church in Silver Spring.

He also was a member of the Polish National Alliance and the Polish-American Arts Association. He volunteered at Potomac Nursery School for 15 years, until 2003.

His wife of 48 years, Gertrude Wienckowski, died in 1992.

Survivors include three children, Louise Wienckowski of Springfield, Mo., Peter Wienckowski of Baltimore and Suzy Wienckowski of Ann Arbor, Mich.; five grandchildren; and two great-grandchildren.