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http://reply.papertrans.cn/3/208/20741/20741-22.png
http://reply.papertrans.cn/3/208/20741/20741-23.png
Submitted on: 31 July 2007.
Revised on: 31 August 2007.
Accepted on: 05 September 2007.
LEARNING & BEHAVIOR---SPRINGER
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http://reply.papertrans.cn/3/208/20741/20741-26.png
Submitted on: 03 September 2007.
Revised on: 16 October 2007.
Accepted on: 12 November 2007.
LEARNING & BEHAVIOR---SPRINGER
http://reply.papertrans.cn/3/208/20741/20741-28.png
http://reply.papertrans.cn/3/208/20741/20741-29.png
Submitted on: 06 November 2010.
Revised on: 18 December 2010.
Accepted on: 01 January 2011.
LEARNING & BEHAVIOR---SPRINGER