My research focuses on understanding cultural variation in children’s social development using a goodness of fit theoretical framework that conceptualizes the developmental trajectories of children’s behavior and social relationships as forms of mutual adaptation, or fit between the behavioral expression of their biological predisposition, and expectations of significant others, such as parents or peers and the limits of their tolerance for deviance from the behavioral norms. I have applied this goodness of fit framework to investigate shyness across cultural contexts and identified and distinguished a regulated form of shyness/withdrawal from anxious shyness in Asian and Asian American children, a finding that has been replicated in various cultural contexts, such as China, South Korea, Turkey, and Hawaii. My current research extends this line of work to understand contextual variations in adjustment of Asian and Asian Americans, including their experiences of early schooling, development of interpersonal perception, and expression of social anxiety.