¡¥mental Versus Nonexperimental Approaches * Research Settings : Laboratory Versus Field * Daga Collection Strategies (1)protocol analysis (2)ºÎ¸ð º¸°í (3)°üÂû ¹æ¹ý(Observational Strategies) * Level of Analysis * Selection of Samlpes * Futrure Chanllenges (1) Toward a Developmental, not Just a Child, Psychology (2) Toward a Better Theory of Contexts CONCL