Examined whether a unidimensional or bidimensional model better explained acculturation of Korean Americans on two levels (separate domains of acculturation and overall acculturation), also noting whether there were meaningfully different forms of acculturation in Korean Americans. Surveys of a national sample of Korean Americans indicated that on both levels, a bidimensional model more completely explained acculturation. Three forms of acculturation were identified (assimilation, integration, and segregation). (SM)