Submitted on: 28 May 2009.
Revised on: 06 August 2009.
Accepted on: 26 September 2009.
___________________AMERICAN EDUCATIONAL RESEARCH JOURNAL
Submitted on: 22 September 2006.
Revised on: 11 November 2006.
Accepted on: 08 January 2007.
___________________AMERICAN EDUCATIONAL RESEARCH JOURNAL
Submitted on: 25 March 2006.
Revised on: 17 July 2006.
Accepted on: 02 August 2006.
___________________AMERICAN EDUCATIONAL RESEARCH JOURNAL
Submitted on: 06 June 2000.
Revised on: 03 October 2000.
Accepted on: 02 December 2000.
___________________AMERICAN EDUCATIONAL RESEARCH JOURNAL
http://reply.papertrans.cn/1/13/1263/1263-15.png
Submitted on: 13 May 2021.
Revised on: 08 August 2021.
Accepted on: 26 August 2021.
___________________AMERICAN EDUCATIONAL RESEARCH JOURNAL
Submitted on: 27 December 2016.
Revised on: 11 February 2017.
Accepted on: 11 March 2017.
___________________AMERICAN EDUCATIONAL RESEARCH JOURNAL
Submitted on: 02 February 2008.
Revised on: 24 April 2008.
Accepted on: 08 May 2008.
___________________AMERICAN EDUCATIONAL RESEARCH JOURNAL
http://reply.papertrans.cn/1/13/1263/1263-19.png
http://reply.papertrans.cn/1/13/1263/1263-20.png