<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Dear Professor Bond,</DIV>
<DIV>Thank you so much for the instruction. I try to read all these wonderful sources. I will surely read them carefully and by heart.</DIV>
<DIV>PDF<BR><BR>--- On <B>Sun, 9/5/10, Trevor Bond <I><email@example.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From: Trevor Bond <firstname.lastname@example.org><BR>Subject: Re: [<SPAN>Rasch</SPAN>] validating questionnaire through Rasch model<BR>To: "Parisa Daftari Fard" <email@example.com>, Rasch@acer.edu.au<BR>Date: Sunday, September 5, 2010, 4:08 PM<BR><BR>
<DIV class=plainMail>Dear PDF,<BR>First an observation and then a structure for your learning , if I might.<BR><BR>There is not and never will be a box to click on Rasch software to "Test validity".<BR><BR>Validity is a much more complex issue than that; Rasch will help, but good <BR>theory driven item development t is a prerequisite.<BR><BR>So, start with a good blurb on Validity:<BR>e.g., Sam Messick is a pretty good Start:<BR>Messick, S. (1995). Validity of psychological assessment. American Psychologist, <BR>50(9),74–149.<BR><BR>Then go to chapter 13 of your favourite book ;-)) and get an intro to the Messick <BR>/ Rasch link there.<BR><BR>That is developed further in:<BR>Bond, T. G. (2004). Validity and assessment: A Rasch measurement perspective. <BR>Metodologia de las Ciencias del Comportamiento, 5(2), 179–194.<BR>and<BR>Smith, E.V., Jr. (2001). Evidence for the reliability of measures and validity of <BR>measure interpretation:A Rasch
measurement perspective. Journal of Applied <BR>Measurement, 2(3), 281–311.<BR><BR>The two Smith and Wolfe papers then develop the detail of how to & <BR>interpretation very nicely:<BR>Wolfe, E.W., & Smith, Jr. E.V. (2007). Instrument development tools and activities<BR>for measure validation using Rasch models: Part I–Instrument Development <BR>Tools. Journal of Applied Measurement, 8, 97-123.<BR><BR>Wolfe, E.W., & Smith, Jr. E.V. (2007). Instrument development tools and activities<BR>for measure validation using Rasch models: Part II–Validation Activities. Journal <BR>of Applied Measurement, 8, 204-233.<BR><BR>and then trawl RMT/ Google as suggested by Mike for lots of examples:<BR>Please Google: validate Rasch Likert and: validate Rasch rating scale<BR><BR>You will find many webpages, for instance, <BR><A href="http://www.waset.org/journals/ijpbs/v2/v2-3-25.pdf"
target=_blank>http://www.waset.org/journals/ijpbs/v2/v2-3-25.pdf</A> - <BR><A href="http://www.uky.edu/~kdbrad2/IFSP-AERA20071.pdf" target=_blank>http://www.uky.edu/~kdbrad2/IFSP-AERA20071.pdf</A> - and many more.<BR><BR>a few ordered steps to help you on the way...<BR><BR>ok?<BR>best wishes<BR><BR>T<BR><BR><BR><BR><BR>Prof Trevor G BOND<BR>Adjunct Professor<BR>School of Education<BR>James Cook University<BR>AUSTRALIA<BR>mob: +61 416 82 70 83<BR></DIV></BLOCKQUOTE></td></tr></table><br>