The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Likelihood-Based Item-Fit Indices for Dichotomous Item Response Theory Models
Abstract
New goodness-of-fit indices are introduced for dichotomous item response theory (IRT) models. These indices are based on the likelihoods of number-correct scores derived from the IRT model, and they provide a direct comparison of the modeled and observed frequencies for correct and incorrect responses for each number-correct score. The behavior of Pearson’s X 2 ( S- X 2) and the likelihood ratio G 2 ( S- G 2) was assessed in a simulation study and compared with two fit indices similar to those currently in use ( Q1- X 2 and Q 1- G 2). The simulations included three conditions in which the simulating and fitting models were identical and three conditions involving model misspecification. S- X 2 performed well, with Type I error rates close to the expected .05 and .01 levels. Performance of this index improved with increased test length. S- G 2 tended to reject the null hypothesis too often, as did Q 1- X 2 and Q 1- G 2. The power of S- X 2 appeared to be similar for all test lengths, but varied depending on the type of model misspecification.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Hambleton, R. K., & Swaminathan, H. (1985) · doi:10.1007/978-94-017-1988-9 · Cited by 1,777
Cited by
The Rediscovery of Bifactor Measurement Models
Reise, S. P. (2012) · Multivariate Behavioral Research · doi:10.1080/00273171.2012.715555 · Cited by 2,112
“In IRTPRO the fit of each item is judged using adjusted chi-square statistics developed by Orlando and Thissen (2000, 2003).”
MethodDevelopment of a PROMIS item bank to measure pain interference
Amtmann, D., Cook, K. F., Jensen, M. P., Chen, W.-H., Choi, S., Revicki, D., Cella, D., Rothrock, N., Keefe, F., Callahan, L., et al. (2010) · Pain · doi:10.1016/j.pain.2010.04.025 · Cited by 1,199
An item response analysis of the pediatric PROMIS anxiety and depressive symptoms scales
Irwin, D. E., Stucky, B., Langer, M. M., Thissen, D., DeWitt, E. M., Lai, J.-S., Varni, J. W., Yeatts, K., & DeWalt, D. A. (2010) · Quality of Life Research · doi:10.1007/s11136-010-9619-3 · Cited by 537
Self-citationNew English and Spanish social health measures will facilitate evaluating health determinants
Hahn, E. A., PROMIS Cooperative Group, DeWalt, D. A., Bode, R. K., Garcia, S. F., DeVellis, R. F., Correia, H., & Cella, D. (2014) · Health Psychology · doi:10.1037/hea0000055 · Cited by 368
“Model fit was assessed with likelihoodbased chi-square statistics (S-Χ2, p>0.01) (Orlando & Thissen, 2000).”
MethodInfluentialBaylor, C., Yorkston, K., Eadie, T., Kim, J., Chung, H., & Amtmann, D. (2013) · Journal of Speech, Language, and Hearing Research · doi:10.1044/1092-4388(2012/12-0140 · Cited by 286
Metadata
- Authors
- Orlando, M., & Thissen, D.
- Venue
- Applied Psychological Measurement
- Publisher
- SAGE Publications
- Published
- 2000-03
- Volume
- 24
- Issue
- 1
- Pages
- 50-64
- ISSN
- 0146-6216 (ISSN-L)
- 1552-3497
- OpenAlex
- W2139338900
- Cited by
- 680
- References
- 1
- FWCI
- 11.12
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Likelihood-Based Item-Fit Indices for Dichotomous Item Response Theory Models. https://app.cochat.ai/papers/10.1177/01466216000241003
- The paper
- Orlando, M., & Thissen, D. (2000). Likelihood-Based Item-Fit Indices for Dichotomous Item Response Theory Models. Applied Psychological Measurement. https://doi.org/10.1177/01466216000241003
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
