1. Learned helplessness in humans;Abramson;Journal of Abnormal Psychology,1978
2. Multiple regression;Aiken,1991
3. LD and normal adolescents’ causal attributions of success and failure at different levels of task difficulty;Aponik;Learning Disability Quarterly,1983
4. The mainsprings of achievement oriented activity;Atkinson,1974
5. Achievement goals and optimal motivation;Barron;Journal of Personality and Social Psychology,2001