She spent several years on the faculty of the University of Pennsylvania’s Center for the Treatment and Study of Anxiety. Dr. Ledley’s research has focused on the nature and treatment of anxiety. She has published over 50 scientific papers and book chapters as well as several books, including Making Cognitive-Behavioral Therapy Work, Third Edition; Improving Outcomes and Preventing Relapse in Cognitive-Behavioral Therapy; Becoming a Calm Mom; and The Worry Workbook for Kids. She lectures widely on the treatment of childhood anxiety.