Theory of mind has been perhaps the most heavily researched topic in developmental psychology for close to 30 years. Most research, as well as most secondary accounts, has concentrated on the first 5 years of life-a time period during which a number of important developmental changes occur. No one, however, has ever believed that the development of theory of mind is complete by age 5, and in recent years there has been a growing body of research literature dedicated to exploring further developments across the middle childhood and adolescent years. Advanced Theory of Mind brings together this large and diverse body of work.