tag:blogger.com,1999:blog-51240205514239956312024-03-13T13:47:00.961-05:00IRT PORTALIRTportal.com aims to make the dichotomous Item Response Theory (IRT) models more commonly used by the researchers all over the world. So, it publishes free IRT tools, news and articles to reach this aim. Unknownnoreply@blogger.comBlogger4125tag:blogger.com,1999:blog-5124020551423995631.post-17971073808951419542015-04-09T14:33:00.002-05:002015-04-09T14:45:42.939-05:00Manipulator v1.2<div class="separator" style="clear: both; text-align: center;">
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The third free IRT tool from www.irtportal.com is the Manipulator. This spreadsheet was originally designed to be used in the half-day pre-conference training that we will deliver in the NCME 2015 Conference with Prof. David J. Weiss of the University of Minnesota. Enjoy!!! <a href="http://irtportal.blogspot.com.tr/p/manipulator.html" target="_blank">Click here for more information.</a></div>
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Alper Sahin, Ph.D.</div>
Unknownnoreply@blogger.com2tag:blogger.com,1999:blog-5124020551423995631.post-39495125064248257482014-06-02T09:02:00.000-05:002014-06-02T09:30:56.520-05:00Test Form Building Assistant (TFBA)<br />
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I am happy to inform you that another free IRT tool, Test Form Building Assistant (TFBA), is ready for download. <i><span style="color: blue;"><a href="http://irtportal.blogspot.com/p/tfba.html" target="_blank">Click here for more information</a></span></i><br />
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<i>P.S. : </i>In order to benefit from all features, you need MS Excel 2007 and above.Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5124020551423995631.post-6447860486987565762013-12-04T00:11:00.002-06:002014-10-22T02:24:24.964-05:00Free irt toolsThe first free irt tool from <a href="http://www.irtportal.com/" target="_blank">www.irtportal.com</a> has been released. It is an excel spreadsheet prepared to let researchers and students easily observe the change in item response functions (IRF), item information functions (IIF) and the hypothetical Standard Error (SE) values attributed to these IIFs with the change in the item parameters. The program is based on 3 Parameter Logistic Model (3PLM). However, similar IRFs and IIFs in 2 Parameter Logistic Model (2PLM) can be obtained if "c" parameter is set to "0". Accordingly, if "a" parameter is fixed to "1" and "c" is fixed to "0", IRFs and IIFs similar to 1 Parameter Logistic Model (1PLM) can be obtained. For more information about the program and some screenshots, please <a href="http://irtportal.blogspot.com/p/free-irt-tools.html" target="_blank"><b><i>click here.</i></b></a>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5124020551423995631.post-3704172103594943112013-12-03T22:47:00.000-06:002014-10-22T02:23:30.134-05:00Welcome to IRTPORTAL.COM<div class="separator" style="clear: both; text-align: center;">
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Welcome to IRTPortal.com. If you are reading this post, it means that you are a person who is interested in Item Response Theory (IRT). If this is the case, you are at the right place. IRTPortal.com aims to make IRT more common among the language testing professionals, educators and educational researchers. In order to reach this aim, IRTportal.com will provide the IRT practitioners with some free IRT tools and will try to be a meeting area for the IRT practitioners all over the world. So, you will be able to find some tools, news items and articles which will make you understand IRT. If you have any inquiries feel free to contact me from asahin@cankaya.edu.tr<br />
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Alper SAHIN, ph.D.<br />
<br />Unknownnoreply@blogger.com0Minneapolis, Minnesota, Birleşik Devletler44.983334 -93.26666999999997644.8035955 -93.589393499999971 45.1630725 -92.943946499999981