Frank J. Harris, 68, a retired psychologist who had spent the last 11 years of his career with the Army Research Institute for the Behavioral and Social Sciences before retiring in 1983, died of cancer Jan. 3 at the Hospice of Northern Virginia. He lived in Reston.

Dr. Harris was a native of Boston and served with the Army Air Forces during World War II. He was a graduate of Suffolk University. He earned a master's degree at the University of Connecticut and a doctorate in industrial psychology at Purdue University.

He was a research psychologist with the U.S. Public Health Service, a group chairman with the old operations research office at Johns Hopkins University, and a group manager with the Stanford Research Institute in California before moving here in the early 1970s.

Dr. Harris was a research psychologist at the Army Human Engineering Laboratory at Aberdeen, Md., for two years before joining the Army Research Institute in 1972.

He was a member of the American Psychological Association.

His marriage to the former Jane Spalding ended in divorce.

Survivors include his wife, Gisela, and their son, Gregory S., both of Reston; a son by his first marriage, Robert B., of Davenport, Calif.; a stepson, Douglas L. Huggins of Los Gatos, Calif.; a brother, Richard E., of Santa Barbara, Calif.; a half-brother, Joseph L. Gregory of Towson, and a grandchild.