Most acculturation research has been conducted in immigrant settings. The present study examined the generalizability of acculturation models and the adaptiveness of acculturation strategies in another bicultural environment--a colonial setting. The sample included 138 girls (M = 13.8 years) and their parents from Hong Kong, a former British colony. Results verified that both Chinese and western acculturation occurred on individual psychological levels and that the bidimensional model was a suitable acculturation framework. Using hierarchical multiple regression, results suggested that acculturation towards Chinese (majority) culture was related to better adaptation in terms of higher academic achievement and positive family dynamics (parental nurturance and closer family relationships). Acculturation towards western (minority) culture was related to poorer adaptation in terms of engaging in greater misconduct and negative family interactions (larger intergenerational value discrepancies and family conflicts). Thus, acculturation towards the majority culture held adaptive implications, whereas acculturation towards the minority culture held maladaptive implications. Consideration of the bicultural composition (e.g., status, prestige, strength of cultural networks of each culture) should be incorporated into acculturation theory to better understand adjustment implications across a wide range of contexts. (Contains 4 tables.)