Show 10 5 10 15 20 50 100 250 Sort by year (new to old) Actions Save this search Download search results Subscribe to news feed Your filters: cql: author="Mattos, Lennia" or (type any "bookEditor journalEditor issueEditor" and editor="Mattos, L... Add to list Journal Article A1 Optimal motivation in Peruvian high schools : should learners pursue and teachers promote mastery goals, performance-approach goals or both? Lennia Mattos, Willy Lens, Maarten Vansteenkiste (UGent) and Athanasios Mouratidis (2017) LEARNING AND INDIVIDUAL DIFFERENCES. 55. p.87-96