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Submitted on: 10 December 2014.
Revised on: 10 February 2015.
Accepted on: 25 February 2015.
___________________Educational Research and Evaluation
Submitted on: 19 May 2016.
Revised on: 14 August 2016.
Accepted on: 01 September 2016.
___________________Educational Research and Evaluation
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Submitted on: 08 May 1998.
Revised on: 30 August 1998.
Accepted on: 10 September 1998.
___________________Educational Research and Evaluation
Submitted on: 08 July 2008.
Revised on: 14 August 2008.
Accepted on: 19 September 2008.
___________________Educational Research and Evaluation
Submitted on: 07 February 2009.
Revised on: 11 April 2009.
Accepted on: 10 May 2009.
___________________Educational Research and Evaluation
Submitted on: 08 June 1999.
Revised on: 31 July 1999.
Accepted on: 10 September 1999.
___________________Educational Research and Evaluation