Submitted on: 09 May 2008.
Revised on: 27 May 2008.
Accepted on: 14 June 2008.
LEARNING AND MOTIVATION
Submitted on: 23 August 2006.
Revised on: 22 September 2006.
Accepted on: 04 October 2006.
LEARNING AND MOTIVATION---ACADEMIC PRESS INC ELSEVIER SCIENCE
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