Despite increased diversity on campuses worldwide, research has documented a lack of intercultural interaction among university students. Culturally mixed groups have been found to be a promising means of promoting the rich, repeated contact necessary for intercultural interaction, but hardly any studies of local students' perceptions of such groups have been conducted in the newly internationalized universities in Asia. Through the lens of an expanded model of investment, this study analyzes reflective journals and interviews with Taiwanese college students to examine their perceptions and experiences of culturally mixed groups. Findings indicate that the majority resisted non-native to non-native speaker intercultural interaction in these groups. This resistance was driven by their pro-standard English ideologies, traceable to the earliest stages of their English education, which promoted native-speaker models and unrealistic imagined communities of native-like speakers.