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Submitted on: 20 June 2017.
Revised on: 28 September 2017.
Accepted on: 19 November 2017.
___________________Educational Measurement-Issues and Practice
Submitted on: 02 October 2006.
Revised on: 05 November 2006.
Accepted on: 01 December 2006.
___________________Educational Measurement-Issues and Practice
Submitted on: 29 April 2011.
Revised on: 19 August 2011.
Accepted on: 15 October 2011.
___________________Educational Measurement-Issues and Practice