This research used a comparative design to test the effect that informal diversity experiences had on college freshman students' cultural maturity. King and Baxter Magolda (2005) considered theories from moral psychology and multiculturalism to form the basis of their cultural maturity theory. Prior research suggests that informal interactions with students from differing backgrounds have a greater impact than formal coursework or training in multiculturalism; however, not all students benefit from these interventions to the same extent. Specifically, minority students, students who reported having frequent interaction with diverse peers in high school, and students who are majoring in investigative and enterprising fields are less likely to benefit from multicultural interventions. This study used the Global Perspective Inventory (GPI) to analyze the cultural maturity of freshman students enrolled in the Day One program at Mississippi State University compared to students enrolled in American Government classes.