Two studies examined the degree to which pursuit of achievement goals is regulated in response to ongoing competence feedback. In Study 1, conducted in a college classroom, goal pursuit remained largely stable throughout the semester, yet poor exam performance predicted a significant decrease in mastery goal and performance-approach goal pursuit and an increase in performance-avoidance goal pursuit. In Study 2, conducted in a laboratory, negative feedback reduced participants' mastery goal pursuit. In addition, both studies showed unique benefits of 2 goals: The performance-approach goal predicted success on exams (Study 1) and a novel activity (Study 2), and the mastery goal predicted higher interest in both studies. Implications of achievement goal regulation for both theory and research methodology are discussed.