Strategies and techniques of expert tutors: Motivational and cognitive processes. Microcomputers in education: Effects of educational programs on children's intrinsic motivation and learning. Intrinsic vs. extrinsic motivation: Detrimental effects of superfluous social controls and strategies for enhancing intrinsic interest. Choice and its consequences: Cultural and situational differences. Social cognition and attribution processes: Attributional biases and inferential errors. Social and moral development.