Dr. Galper had been on the staff of the American Psychological Association since 2007, and he was instrumental in the development of the association’s clinical treatment guidelines. He wrote articles, book chapters and abstracts on a variety of subjects, including therapies for the treatment of pain, hypnosis, exercise and coping with stress.

Earlier in his career, as a senior research associate at the University of Texas Southwestern Medical Center in Dallas, Dr. Galper analyzed 1,000 studies of the effects of exercise on mood. He concluded that 30 minutes of moderate-intensity exercise at least five times a week “should be enough to have an effect” on mood improvement in people with depression.

Dr. Galper was a native of Bethesda, and he grew up on Capitol Hill in Washington. As a youngster, he played on neighborhood soccer teams, and he graduated in 1984 from the private Field School in Washington. He was a 1990 graduate of Duke University, and he received a doctorate in clinical psychology from Virginia Tech in 1999.

He studied and worked in the University of Virginia Health System and in Dallas before returning to Washington in 2007.

In addition to working for the American Psychological Association, Dr. Galper had a private clinical practice. His avocations included artistic glass making and playing the guitar.

His marriages to Sharon Kearns and Heather Schmidt ended in divorce.

Survivors include his parents, Harvey and Alice Galper of Washington; and a brother, David Galper of Darien, Conn.

— Bart Barnes