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Submitted on: 30 June 2013.
Revised on: 10 October 2013.
Accepted on: 15 November 2013.
___________________International Journal of Educational Psychology
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Submitted on: 09 December 2004.
Revised on: 26 February 2005.
Accepted on: 10 April 2005.
___________________International Journal of Educational Psychology
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Submitted on: 22 September 1999.
Revised on: 06 December 1999.
Accepted on: 27 January 2000.
___________________International Journal of Educational Psychology
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Submitted on: 30 December 2012.
Revised on: 21 March 2013.
Accepted on: 04 May 2013.
___________________International Journal of Educational Psychology