Achieving self-regulation : the trial and truimph of adolescence / Barry J. Zimmerman -- Self-efficacy and adolescents' motivation / Dale H. Schunk and Samuel D. Miller -- Adolescents' expectansies for success and achievement task values during the middle and high school years / Allan Wigfield and Stephen Tonks -- The pivotal role of frames of reference in academic self-concept formation : the "big fish-little pond" effect / Herbert W. Marsh and Rhonda G. Craven -- Adolescents' achievement goals : situating motivation in sociocultural contexts / Avi Kaplan and Martin L. Maehr -- Rewards and intrinsic motivation : a needs-based developmental perspective / Martin V. Covington -- What adolescents need : a self-determination theory perspective on development within families, school, and society / Jennifer G. La Guardia and Richard M. Ryan -- From duty to desire : the role of students' future time perspective and instrumentality perceptions for study motivation and self-regulation / Willy Lens, Joke Simons, and Siegfried Dewitte -- Interest and adolescence / Suzanne Hidi and Mary Ainley -- Social determinants of public behavior of middle school youth : perceived peer norms and need to be accepted / Jaana Juvonen and R. Jean Cadigan -- Development and consequences of stereotype vulnerability in adolescents / Joshua Aronson and Catherine Good -- Studying motivation to learn during early adolescence : a holistic perspective / Robert W. Roeser and Mollie Galloway