The personality of children and adolescents is related to many aspects of individuals' later developments, including physical and psychological health, educational and occupational achievements, as well as social relationships. It can provide the basis and reference for the work of their personality development and cultivation to clarify the age differences in children and adolescents' personality. However, the existing development-oriented research has not reached a consensus on the age differences in personality in Western children and adolescents, and the debate on stability and change of p...