Studies on multiculturalism and polyculturalism are typically carried out in multicultural societies; studies on relatively homogeneous societies are rare. In this study, we use a mixed-method approach to explore how the two lay theories of culture are understood in a culturally homogeneous community (Wonosobo) in a multicultural country (Indonesia). In Study 1, data gathered using focus group discussions with 36 university students were analyzed using inductive thematic analysis. In Study 2, 264 university students answered questionnaires on lay theories and intergroup attitudes toward Chinese-Indonesians. Both studies suggest an understanding of the two lay theories of culture, but that multiculturalism was more well-defined in the students' responses in the focus group discussions and more strongly endorsed in the questionnaire data. Multiculturalism was often discussed with reference to the national ideology of Pancasila and was also associated with greater stereotyping of Chinese-Indonesians. Polyculturalism was typically mentioned only with reference to multiculturalist ideas and had negative intergroup consequences when interacting with multiculturalism. The results are discussed as ABOUT THE AUTHORS Susana Tjipto holds a doctoral degree in clinical psychology. She teaches at the Faculty of Psychology, Sanata Dharma University, Indonesia, teaching undergraduate and graduate courses in psychology. She has been actively involved in both practice as a clinical psychologist and in scientific research with a deep and consistent interest in the interplay between culture and human behavior.Allan B. I. Bernardo is Professor of Psychology at the University of Macau. His research focuses on three themes: (a) lay theories and intergroup relations, (b) social cognitive processes related to socioeconomic differences, inequality, and mobility, and (c) cultural aspects of hope, positive strengths, and well-being. He holds a PhD in psychology from Yale University.