At the beginning of the second millennium, many university students in Taiwan that are enrolled in Freshman English are still being taught with teacher-centered methods. This study, which was inspired by the author's studies and research in the theoretical arguments of the Natural Approach and Psychological Method put forth by American educator Stephen Krashen, was undertaken for the purpose of evaluating the practical applicability of communicative methodologies in a Taiwan classroom setting. This study especially focuses on the connection between students' interest, self-esteem, attitude, motivation, and the use of various student-centered communicative activities designed to enhance confidence and language acquisition. Through the use of both quantitative and qualitative research methods focusing on learner perceptions of their overall learning experience, the author proves the effectiveness of pedagogies based on Krashen's theory of affective filter. Appended are: (1) Survey questionnaire for investigating the influence of the "Affective Filter." (Contains 2 tables, 2 figures and 2 graphs.)