"This book is the first of its kind and, in many respects, a major force in defining an emergent area of inquiry within the field of child psychology....Rubin and Asendorpf have assembled a volume that receives high marks for scholarship. They do an excellent job of introducing the book's major aims and organizing the theoretical and empirical contributions. The result is a book that not only covers a great deal of new territory but also succeeds at consolidating a seemingly diverse array of research programs and agendas....it is a book that offers authoritative perspectives and comprehensive coverage of an important domain."—Contemporary Psychology