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Research Reports

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Alphabetical Listing of Current Research Reports

Application of Heuristic-Based Semantic Similarity Between Single-Topic Texts for the LSAT (RR 12-05)
by Dmitry I. Belov and David A. Kary

Application of the M-Index for the LSAT (RR 10-01)
by Dmitry I. Belov, Law School Admission Council; and Ronald D. Armstrong, Rutgers University

Application of Robust Optimization to Automated Test Assembly (RR 12-02)
by Bernard P. Veldkamp, University of Twente, Enschede, The Netherlands

An Application of the VM-Index for the LSAT (RR 10-02)
by Dmitry I. Belov

Assessing the Impact of Topic Interest on Comprehension Processes (RR 11-02)
by Joseph P. Magliano, Amanda M. Durik, and Janet K. Holt, Northern Illinois University

Automatic Prediction of Item Difficulty Based on Semantic Similarity Measures (RR 08-04)
by Dmitry I. Belov and Lily Knezevich

Balanced Item Pool Assembly in Computerized Adaptive Testing (RR 07-04)
by Dmitry I. Belov

Bayesian Estimation Methods for Multidimensional Models for Discrete and Continuous Responses (RR 06-05)
by Cees A. W. Glas, University of Twente, Enschede, The Netherlands

Bayesian Estimation Methods for Multidimensional Models for Discrete and Continuous Responses with a Structure on the Item and Person Parameters (RR 07-03)
by Cees A. W. Glas and Oksana Korobko, University of Twente, Enschede, The Netherlands

A Bivariate Lognormal Response-Time Model for the Detection of Collusion Between Test Takers (RR 08-06)
by Wim J. van der Linden, University of Twente, Enschede, The Netherlands

Combinatorial Search Algorithm for Detection of Test Collusion (RR 13-01)
by Dmitry I. Belov

Comparability of Test-Taker Proficiency Scores on Computer Adaptive Tests Using Real and Simulated Data (RR 11-04)
by Josiah Evans, Law School Admisison Council; Jimmy de la Torre, Rutgers University; and Peter J. Pashley, Law School Admission Council

Comparison Study of Item Preknowledge Detectors (RR 14-01)
by Dmitry I. Belov

Conceptual Issues in Response-Time Modeling (RR 08-01)
by Wim J. van der Linden, University of Twente, Enschede, The Netherlands

Derivation and Applicability of Asymptotic Results for Multiple-Subtest Person-Fit Statistics (RR 15-02)
by Casper J. Albers, Rob R. Meijer, and Jorge N. Tendeiro, University of Groningen, Groningen, the Netherlands

Detection of Aberrant Answer Changes via Kullback–Leibler Divergence (RR 14-04)
by Dmitry I. Belov

Detection of Answer Copying via Kullback–Leibler Divergence and K-Index (RR 09-01)
by Dmitry I. Belov, Law School Admission Council; and Ronald D. Armstrong, Rutgers University

Detection of Invalid Test Scores on Admission Tests: A Simulation Study Using Person-Fit Statistics (RR 15-03)
by Jorge N. Tendeiro, Rob R. Meijer, and Casper J. Albers, University of Groningen, Groningen, the Netherlands

Detection of Invalid Test Scores: The Usefulness of Simple Nonparametric Statistics (RR 13-05)
by Jorge N. Tendeiro and Rob R. Meijer, University of Groningen, Groningen, the Netherlands

Detection of Large-Scale Item Preknowledge in Computerized Adaptive Testing via Kullback–Leibler Divergence (RR 12-01)
by Dmitry I. Belov

Distributions of Kullback–Leibler Divergence and Its Application for the LSAT (RR 09-02)
by Dmitry I. Belov, Law School Admission Council; and Ronald D. Armstrong, Rutgers University

The Effect of Item and Person Misfit on Selection Decisions: An Empirical Study (RR 15-05)
by Rob R. Meijer and Jorge N. Tendeiro, University of Groningen, Groningen, the Netherlands

Estimating and Testing the Extended Testlet Model (RR 12-03)
by Cees A. W. Glas, University of Twente, Enschede, The Netherlands

Fit to Testlet Models and Differential Testlet Functioning (RR 12-07)
by Cees A. W. Glas, University of Twente, Enschede, The Netherlands

Identifying Critical Testlet Features Using Tree-Based Regression: An Illustration With the Analytical Reasoning Section of the LSAT (RR 12-04)
by Muirne C. S. Paap, Qiwei He, and Bernard P. Veldkamp, University of Twente, Enschede, The Netherlands

How Serious Is IRT Misfit for Practical Decision-Making? (RR 15-04)
by Jorge N. Tendeiro and Rob R. Meijer, University of Groningen, Groningen, the Netherlands

Information-Based Versus Number-Correct Routing in Multistage Classification Tests (RR 07-05)
by Alexander Weissman and Dmitry I. Belov, Law School Admission Council; and Ronald D. Armstrong, Rutgers University

Item Response Theory Parameter Estimation with Response Times as Collateral Information (RR 06-04)
by Wim J. van der Linden, Rinke H. Klein Entink, and Jean-Paul Fox, University of Twente, Enschede, The Netherlands

Joint Modeling of Ability and Differential Speed Using Responses and Response Times (RR 16-04)
by Jean-Paul Fox, University of Twente, Enschede, the Netherlands

Likelihood-Based Estimation Methods for Models for Concurrent Continuous and Discrete Responses With a Structure for the Item and Person Parameters (RR 06-03)
by Wim J. van der Linden and Cees A. W. Glas, University of Twente, Enschede, The Netherlands

Likelihood-based Statistics for Continuous and Discrete Responses With a Structure for the Item and Person Parameters (RR 06-06)
by Cees A. W. Glas and Wim J. van der Linden, University of Twente, Enschede, The Netherlands

Linking Response-Time Parameters Onto a Common Scale (RR 08-02)
by Wim J. van der Linden, University of Twente, Enschede, The Netherlands

Marginalized Measurement Variance Modeling and Bayes Factor Testing (RR 16-06)
by Jean-Paul Fox and Vera Broks, University of Twente, Enschede, the Netherlands

Modeling Differential Working Speed in Educational Testing (RR 14-05)
by Jean-Paul Fox, University of Twente, Enschede, the Netherlands

Optimal Detection of Aberrant Answer Changes (RR 16-02)
by Dmitry I. Belov

Optimizing Information Using the Expectation-Maximization Algorithm in Item Response Theory (RR 11-01)
by Alexander Weissman

An Overview of Research on the Testlet Effect: Associated Features, Implications for Test Assembly, and the Impact of Model Choice on Ability Estimates (RR 13-03)
by Muirne C. S. Paap, Cees A. W. Glas, and Bernard P. Veldkamp, University of Twente, Enschede, the Netherlands

Predictive Control of Speededness in Adaptive Testing (RR 07-02)
by Wim J. van der Linden, University of Twente, Enschede, The Netherlands

The Probability of Exceedance as a Nonparametric Person-Fit Statistic for Tests of Moderate Length (RR 13-06)
by Jorge N. Tendeiro and Rob R. Meijer, University of Groningen, Groningen, the Netherlands

Review of Modern Methods for Automated Test Assembly and Item Pool Analysis (RR 16-01)
by Dmitry I. Belov

Robust Automated Test Assembly for Testlet-Based Tests: An Illustration With the Analytical Reasoning Section of the LSAT (RR 13-02)
by Bernard P. Veldkamp and Muirne C. S. Paap, University of Twente, Enschede, the Netherlands

Robust Text Similarity and Its Applications for the LSAT (RR 13-04)
by Dmitry I. Belov, Law School Admission Council; Bernard P. Veldkamp, University of Twente, Enschede, the Netherlands; and David A. Kary, Law School Admission Council

Sequencing an Adaptive Test Battery (RR 08-05)
by Wim J. van der Linden, University of Twente, Enschede, The Netherlands

Some Practical Issues in Computerized Adaptive Testing With Response Times (RR 14-06)
by Bernard P. Veldkamp, University of Twente, Enschede, the Netherlands

Statistical Algorithms for Detection of Test Collusion (RR 11-03)
by Dmitry I. Belov

Statistical Tests for Conditional Independence in a Hierarchical Model for Speed and Accuracy on Test Items (RR 06-02)
by Wim J. van der Linden and Cees A. W. Glas, University of Twente, Enschede, The Netherlands

Stochastic Programming for Individualized Test Assembly With Mixture Response Time Models (RR 15-01)
by Bernard P. Veldkamp and Marianna Avetisyan, University of Twente, Enschede, the Netherlands

Structural Modeling Using Two-Step MML Procedures (RR 08-07)
by Cees A. W. Glas, University of Twente, Enschede, The Netherlands

A Study of Structural Modeling Using Plausible Value Imputation (RR 08-03)
by Cees A. W. Glas and Hanneke Geerlings, University of Twente, Enschede, The Netherlands

Test Design and Speededness (RR 07-01)
by Wim J. van der Linden, University of Twente, Enschede, The Netherlands

Testing for Aberrant Behavior in Response Time Modeling (RR 14-02)
by Sukaesi Marianti, Jean-Paul Fox, Marianna Avetisyan, and Bernard P. Veldkamp, University of Twente, Enschede, the Netherlands

Unraveling the Relationship Between Testlet Features and Item Parameters: An Empirical Example (RR 12-06)
by Muirne C. S. Paap and Bernard P. Veldkamp, University of Twente, Enschede, The Netherlands

The Use of Person-Fit Scores in High-Stakes Educational Testing: How to Use Them and What They Tell Us (RR 14-03)
by Rob R. Meijer and Jorge N. Tendeiro, University of Groningen, Groningen, the Netherlands

Using Response Times for Item Selection in Computerized Adaptive Testing (RR 06-01)
by Wim J. van der Linden, University of Twente, Enschede, The Netherlands

Archived Research Reports

LSAC has archived all Research Reports that were published 10 or more years ago. These reports are still available upon request.

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