He developed a playful approach to child raising, in general, and to childhood anxiety, in particular.
He attended Haverford College and received his PhD in clinical psychology from Duke University.
After an internship at Tulane University, he began a research and private practice career in Madison, Wisconsin.
His column in 'Nick Jr. Magazine' was the winner of the 2003 'Golden Lamp' award from 'Education Press'.
He wrote two books about children's friendships and peer relationships with Michael Thompson and Catherine O'Neill Grace: 'Best Friends, Worst Enemies', and 'Mom, They're Teasing Me'.