equateIRT: AnRPackage for IRT Test Equating
نویسندگان
چکیده
منابع مشابه
Can IRT Solve the Missing Data Problem in Test Equating?
In this paper test equating is considered as a missing data problem. The unobserved responses of the reference population to the new test must be imputed to specify a new cutscore. The proportion of students from the reference population that would have failed the new exam and those having failed the reference exam are made approximately the same. We investigate whether item response theory (IR...
متن کاملIRT Observed-Score Kernel Equating with the R Package kequate
The R package kequate enables observed-score equating using the kernel method of test equating. We present the recent developments of kequate, which provide additional support for item-response theory observed score equating using 2-PL and 3-PL models in the equivalent groups design and non-equivalent groups with anchor test design using chain equating. The implementation also allows for local ...
متن کاملAsymptotic Standard Errors of IRT Equating Coefficients Using Moments
The asymptotic standard errors of the IRT equating coefficients given by the mean/sigma, mean/mean and mean/geometric mean methods are derived when the two-parameter logistic model holds and item parameters are obtained by the marginal maximum likelihood estimation. The case of two nonequivalent examinee-groups and the case of single group are considered. The numerical examples show that the me...
متن کاملA Review of the Effects on IRT Item Parameter Estimates with a Focus on Misbehaving Common Items in Test Equating
Many studies have investigated the topic of change or drift in item parameter estimates in the context of item response theory (IRT). Content effects, such as instructional variation and curricular emphasis, as well as context effects, such as the wording, position, or exposure of an item have been found to impact item parameter estimates. The issue becomes more critical when items with estimat...
متن کاملExamining the Impact of Drifted Polytomous Anchor Items on Test Characteristic Curve (TCC) Linking and IRT True Score Equating
As part of its nonprofit mission, ETS conducts and disseminates the results of research to advance quality and equity in education and assessment for the benefit of ETS's constituents and the field. To obtain a PDF or a print copy of a report, please visit: Abstract In a common-item (anchor) equating design, the common items should be evaluated for item parameter drift. Drifted items are often ...
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ژورنال
عنوان ژورنال: Journal of Statistical Software
سال: 2015
ISSN: 1548-7660
DOI: 10.18637/jss.v068.i07