http://reply.papertrans.cn/2/181/18083/18083-31.png
http://reply.papertrans.cn/2/181/18083/18083-32.png
Submitted on: 27 May 2012.
Revised on: 17 June 2012.
Accepted on: 04 July 2012.
___________________Journal of Mixed Methods Research
http://reply.papertrans.cn/2/181/18083/18083-34.png
http://reply.papertrans.cn/2/181/18083/18083-35.png
http://reply.papertrans.cn/2/181/18083/18083-36.png