The purpose of this study is to examine the effects of students' experiences in a study abroad program. In particular, my discussion will include issues of intercultural understanding, transculturation, and ambiguity tolerance. Two types of questionnaires were administered to 230 university sophomores before and after the study abroad program. The first questionnaire was designed to measure variances in the students' intercultural understanding and transculturation. The data was analyzed by factor analysis. The analysis extracted five factors among 24 questionnaire items. The second questionnaire was designed to measure levels of students' ambiguity tolerance. The results of changes in ambiguity tolerance and TOEFL scores are also discussed.