Computer Program Exchange Applied Psychological Measurement 2018, Vol. 42(5) 403–404 birtr: A Package for The Author(s) 2018 Reprints and permissions: sagepub.com/journalsPermissions.nav ‘‘The Basics of Item DOI: 10.1177/0146621617748327 journals.sagepub.com/home/apm Response Theory Using R’’ 1 2 Seock-Ho Kim and Frank B. Baker Keywords item response theory, computer program, Rasch model Description The birtr package provides nine important functions, iccplot, icccal, icc, iccfit, groupinv, tcc, ability, tif, and rasch, for Baker and Kim (2017). Note that the functions can be used with the previous edition of the book (Baker, 2001) that is freely available from the following URL: http://echo.edres.org:8080/irt/baker/ The iccplot function plots an item characteristic curve under the two-parameter logistic model. The icccal function computes the logistic deviate L, the exponent of negative L, the denominator, and the value of probability of correct response for each of seven ability levels evenly spaced from –3 to +3 under the one-, two-, or three-parameter logistic item characteris- tic curve model. The icc function plots an item characteristic curve under the one-, two-, or three-parameter logistic model. The iccfit function plots the item characteristic curve and the simulated observed proportions of correct response from the one-, two-, or three-parameter logistic model. The groupinv function
Applied Psychological Measurement – SAGE
Published: Jul 1, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera