"He was a dedicated teacher and thoroughly professional in all of his interactions, and he was a very dear friend," said Dr. Bruce K. Shapiro, professor of pediatrics and vice president of training at Kennedy Krieger, a friend and colleague for 25 years.

"His approach to treatment was capitalizing on a person's strengths. He would discern what the person could do and then capitalize on that so they could reach their full potential," said Dr. Shapiro.

"Dr. Kaiser was a wonderful mentor and was also a strong supporter of families and parents," said Dr. Shapiro. "He was a very easy person to relate to and over the course of his professional career, he interacted with thousands of trainees."

Dr. Martha B. Denckla, a neurologist at Kennedy Krieger, said, "He was extraordinary. I've been in this field for 40 years, and he was the best child psychiatrist I've worked under. He was an expert in autism, ADHD and other disabilities, and because he had been a pediatrician, was a more practical person."

"He was very pragmatic when it came to interacting with the patients," she said. "If they played chess, he'd play chess with them. If they played Go Fish, he'd play Go Fish. He would not force them to talk, but then they would start to talking. He was a very wise man."

Dr. Kaiser retired several years ago but kept active in his field.

He was an ardent Orioles fan and enjoyed listening to classical music.

Dr. Kaiser was a member of Chizuk Amuno Congregation and was a former member of Beth Am Congregation.

Services were held Aug. 7 at Sol Levinson & Bros.

In addition to his son, he is survived by his wife of 63 years, the former Joan Ruth Kleiman; and a daughter, Susan L. Kaiser of Owings Mills.