Louise W. B. Dean, 83, a retired teacher and longtime Washington resident, died July 10 aboard the cruiseship Polaris in Norwegian waters after a heart attack.

She had flown to Norway on July 2 and boarded the Polaris for a vacation tour of the fiords.

Mrs. Dean taught remedial reading at the Hedges School in Vienna, Va., during the 1950s. Hedges was a private elementary school.

In the early 1960s, she accompanied a grandchild, Holly Arrison, to the Logooedics Institute in Wichita, Kan. The granddaughter had been afflicted with cerebral palsy since birth, and underwent speech and physical therapy at the Institute for nine years.

During this time, Mrs. Dean stayed with the child and helped care for her. She also taught at the Institute, which helped rehabilitate adult stroke and accident victims and children suffering from aphasia, the loss of the power to use or understand words due to accident or disease.

Mrs. Dean was a native of Waterbury, Conn., and came to Washington in 1941. She was a 1919 graduate of Wellesley College and earned a master's degree in education at George Washington University in 1956. She taught child development courses at the University of Maryland for several years.

She was a member of the Washington Wellesley Club for 38 years.

She was the widow of Army Maj. John Paul Dean, who died in 1941.

Mrs. Dean is survived by four daughters, Charlotte D. Burgess, of Newton, Iowa, Priscilla D. Painter, of Arlington, Phyllis D. Arrison, of Lakewood, N.Y., and Lois D. Courtney of Chevy Chase; two sons, John P. Dean, of Chevy Chase, and Ralph B. Dean, of Bristow, Va.

The family suggests that expressions of sympathy be in the form of contributions to the United Cerebral Palsy Fund. CAPTION: Picture, LOUISE W. B. DEAN