quality:corruption, linguistic:paraphrasing
Blaney, Stephan, Rosenfield, Aronson and Sikes

Significant increases were seen in jigsaw self-esteem accompanied by a decrease in trad self-esteem. Jigsaw students liked school more, (Caucasians generally, Mexican-Americans slightly, but not African-Americans.) Trad students liked school less (Caucasians generally, not Mexican-Americans, and African-Americans significantly.) The authors contribute this to the fact that Mexican-American jigsaws may have felt forced to participate in peer teaching. Two other questions produced significant results. Competitiveness among jigsaws decreased and increased among trads. Jigsaws felt they could learn more from other students while trads did not. Students reported increase liking of their group members, but they also increased their liking of other students in the class.