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Submitted on: 18 April 2011.
Revised on: 25 May 2011.
Accepted on: 29 June 2011.
___________________Journal of Research on Educational Effectiveness
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Submitted on: 05 February 2017.
Revised on: 22 March 2017.
Accepted on: 18 April 2017.
___________________Journal of Research on Educational Effectiveness
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