7-9 June 2010, Arnhem, The Netherlands

Click here to download ACAT 2010 Program & Abstracts Booklet

The International Association for Computerized Adaptive Testing (IACAT) is a nascent organization dedicated to advancing computerized adaptive testing (CAT) through research and education. IACAT held its first annual conference June 7- 9, 2010. The conference took place in Arnhem, The Netherlands. The conference, hosted by the Research Center for Examination and Certification (RCEC: www.rcec.nl), took place at the Conference Centre Papendal. (www.papendal.com)


The conference is an international forum for CAT researchers and others interested in CAT to meet and share ideas and developments on CAT. At the conference, the following well-known scholars gave keynote presentations:

Cees Glas, University of Twente, The Netherlands
Mark Reckase, Michigan State University, USA
Lawrence Rudner, Graduate Management Admission Council, USA
Wim van der Linden, CTB/McGraw-Hill, USA
Otto Walter, Institute of Psychology, Aachen University, Germany
Matthew Finkelman, Tufts University School of Dental Medicine, USA
Furthermore, about 50 papers and 20 posters were presented. There was time for informal meetings and social activities.

Pre-conference workshops

On June, 7 form 9.00-12.00, workshops are organized on introductory and more advanced topics in CAT. The following workshops will be run. The costs of attending a workshop was € 100.

Nathan Thompson, Assessment Systems Corporation: Introduction to CAT

And two advanced topics: 
Mark Reckase, Michigan State University: Multidimensional CAT
Bernard Veldkamp; University of Twente: Item selection, exposure control, and test specifications in CAT

Conference Program

Monday, June 7th

Keynote speakers

The impact of computerized adaptive testing on measurement theory

Mark D. Reckase

How to make adaptive testing more efficient?

Wim J. van der Linden

Concurrent Sessions Paper presentations

Contexts of CAT

The theoretical issues that are important to operational adaptive testing.

Brian Bontempo, Steven L. Wise, Anthony R. Zara, and G. Gage Kingsbury

Implementation of adaptive algorithms in CBT Systems

Mark Molenaar

Adaptive testing in group level survey assessments

Andreas Oranje and Xueli Xu

Enlarging an item pool by rule-based item generation

Lolle Schakel and Annette Maij-de Meij

Applications of CAT (part 1)

Implementing figural matrix items in computerised adaptive testing system

Tay Poh Hua, Raymond Fong, Low Sik Kuan and Chee Meng On

Short forms versus CAT for the assessment of patient reported outcomes measures

Richard C. Gershon, David Cella and Seung Choi

Validity of CAT in personnel selection

Sara Gutierrez, Darrin Grelle & Mike Fetzer

Adaptive rule-based intelligence testing

Jonas Bertling & Heinz Holling

Issues in ability estimation

Competence´s initial estimation in computer adaptive testing

Félix Castro, Joel Suárez and Raul Chirinos

Guess again: The effect of correct guesses on scores in an operational CAT program

Eileen Talento-Miller, Kyung T. Han, Fanmin Guo

Ability estimation and test ending strategies of CAT for achievement testing on different samples

Ilker Kalender and Giray Berberoglu

Effect of θ estimation method and starting value on the recovery of θ

Rick Guyer and David J. Weiss

Concurrent Sessions Paper presentations

Item selection (Part 1)

CAT item selection and person fit: Predictive efficiency and detection of atypical symptom profiles

Barth B. Riley, Michael L. Dennis, and Kendon J. Conrad

Adaptive tests of adjustable difficulty

Huub Verstralen

Effects of computerized adaptive testing and mean response probability on test-taking motivation and performance

Regine Asseburg

Utilizing time data

Using response times to improve measurement precision for examinees with aberrant response behaviors in computerized adaptive testing

Jyun-Hong Chen, Shu-Ying Chen, Chuan-Ju Lin  

A simple method for controlling test time intensity in CAT

Fanmin Guo

When does item duration become a relevant variable in measurement?

Dr. Annette Maij-de Meij and MSc. Lolle Schakel

New methods

Using the Rasch model-based LLTM for composing item difficulties on demand – the test Alpha-Numerical TOPologies

Klaus D. Kubinger and Nina Heuberger

A Kalman filtering approach to computerized adaptive testing

P.W. van Rijn

Bayesian optimal design for the Rasch model and linear logistic test model

Heinz Holling

Tuesday, June 8th

Keynote speakers

Clinical and medical applications of computer adaptive testing

Otto B. Walter

Computer adaptive testing for small scale programs and instructional systems

Lawrence M. Rudner

Poster Presentations

Does the theory work in practice?

Hilary Ferral

 CML estimations in multistage testing

Robert Zwitser and Gunter Maris

Assessing the critical thinking ability of undergraduate students in a Nigerian University

Dr. H. O. Owolabi, Mrs. C. O. Owolabi, Dr. Bisi Onasanya and Dr. Mrs. R. O. Oduwaiye

An adaptive scheme for the dynamic rasch calibration of pilot items

Rense Lange

Teate depression inventory: A rasch derived self-report inventory of depression

Balsamo, Michela, Sergi, Maria Rita, Saggino, Aristide and Giuseppe Giampaglia

Computer generated item analysis based on three-parameter Logistic model as applied to chemistry achievement test

Susan C. Unde and Chita P. Evardone

How does the equal step size affect the number of items admistered in computerized adaptive testing

Atilla Halil ELHAN and Derya ÖZTUNA

Teacher and student experiences with the use of an adaptive test (WISCAT-pabo)

Mia van Boxel and Jeanine Treep

Designing a computerized adaptive test to measure verbal reasoning

Gabriela Lozzia, María Ester Aguerri, Facundo Abal and Horacio Attorresi

Selection of common items in full metric calibration for the development of CAT item banks

Jieun Lee and David J. Weiss

A comparison of different parameter estimation methods

Isabel Cañadas, Sonia Tirado and Rebeca Bautista

Omitted responses: The effect on item parameters

Sonia Tirado, Rebeca Bautista and Isabel Cañadas

The sample size effect on item parameters

Rebeca Bautista, Isabel Cañadas and Sonia Tirado

Effects of medium on writing assessment of learners of chinese as a foreign language

Yu Zhu (Ph.D.) and Andy SL Fung (Ph.D.)

Estimating item response theory based item parameters when response matrix is quite sparse

Vipin Chilana

Development of a physical function CAT

Man Hung, David J.Weiss and Charles L. Saltzman

Constructing a new fluid intelligence test: An IRT approach

Romanelli R., Saggino A. and Weiss D. J.


Concurrent Paper presentations

Multidimensional CAT

A general multidimensional computerized adaptive testing platform in health outcomes measurement

Seung W. Choi, Richard C. Gershon, and Dave Cella

Benefits of multidimensional adaptive testing from a practical point of view

Ulf Kröhne and Ivailo Partchev

The bifactor model and its application to multidimensional computerized Adaptive Testing

Dong Gi Seo and David J. Weiss

Multiple-category classification with multidimensional adaptive testing in large-scale assessments

Nicki-Nils Seitz and Andreas Frey

CAT for Classification

Adaptive sequential mastery testing using the Rasch model and Bayesian sequential decision theory

Hans J. Vos and Cees A.W. Glas


Effects of different termination criteria on classification consistency in CAT

Nam Keol Kim

Using the sequential probability ratio test when items and respondents are mismatched.

Maaike van Groen & Angela Verschoor

Nominal error rates in computerized classification testing

Nathan A. Thompson

CAT in Education


Orthography testing and CAT - on the way to establish individual orthography learning

Sarah Frahm

Adapt your listening test to your level, Klaas Schreuder

Angela Verschoor, and Niels Veldhuijzen.

WISCAT-pabo: Computerized adaptive testing of arithmetic skills of first-year students at primary school teacher training colleges

Gerard J.J.M. Straetmans and Theo J.H.M. Eggen

DESIGNING & Using adaptive tests for large scale formative assessment

John Winkley

Item selection (Part 2)

Item selection criteria in CAT based on predictive distributions

Mathilde Huisman-van Dijk and Frans Kamphuis

Content control with the maximum priority index method in multidimensional adaptive testing

Andreas Frey and Ying Cheng and Nicki-Nils Seitz

The maximum priority index for generalized partial credit model in computerized adaptive testing

Zeng Lingyan


Conformation testing and assessment of change


Unproctored internet test verification: Using adaptive confirmation testing

Guido Makransky and Cees Glas

Accepting the null: Determining no change within the adaptive measurement of change

Steven W. Nydick and David J. Weiss

Measuring individual growth curves with computerized adaptive testing

Shannon M. Von Minden and David J. Weiss


Collatoral information in CAT

A Bayesian approach for introducing empirical information in CAT

Mariagiulia Matteucci

Text classification in prior selection of CAT

Qiwei He

Robust item selection in computerized adaptive testing

Bernard Veldkamp

Wednesday, June 9th


Keynote speakers

Bootstrapping an item bank

Cees. A. W. Glas and Guido Makransky

Computerized classification testing to predict an observable outcome

Matthew Finkelman, Yulei He, Giles Hooker, Wonsuk Kim, Robert Keller and Barbara Gandek


Item bank development

Pushing the limits of an adaptive test: Interaction between the test population and the item pool

Steven L. Wise, Brian Bontempo, and G. Gage Kingsbury

Optimal calibration designs for computerized adaptive testing

Angela Verschoor

Flexibly and accurately evaluating item pool adequacy and optimization for linear-to-CAT conversion using optimization

Xiang Bo Wang and Xinhui Xiong

Applications of CAT (part 2)


A comparison of item exposure, test information, and theta recovery for LOFT, CAT, and fixed form tests

Kirk A. Becker, Brian Bontempo, Phil Dickison, and James S. Masters

Opportunities on adaptive testing in India

Dr. V. Natarajan and Mr. Rajeev Mennon

A dynamic way of equating for CAT practice

Zhang Quan

Item Exposure

Conditional multiple maximum exposure rates in CATs.

Juan Ramon Barrada, Julio Olea, and Francisco J. Abad

The on-line procedure for simultaneous control of item exposure and test overlap in variable length computerized adaptive testing

Chia-Ling Hsu and Wen-Chung Wang

Controlling on-line item exposure and test overlap in CAT with the ability-based guessing model

Shiu-Lien Wu, Wen-Chung Wang, and Shu-Ying Chen

The conference is organized by a committee consisting of:
● Clifford Donath, Donath Group, USA
● Theo Eggen, Cito, University of Twente, Netherlands
● Nathan Thompson, Assessment Systems Corporation,USA
● David Weiss, University of Minnesota, USA
● Dr. Natarajan Venkatesa, MeritTrac, Inc., India
● Birgit Olthof, RCEC, University of Twente, Netherlands

Previous CAT conferences were held in 2007 and 2009, sponsored by the Graduate Management Admissions Council. IACAT was founded at the 2009 conference, and the 2010 conference marks the first official function of the organization.

About RCEC

The Research Center for Examination and Certification (RCEC: www.rcec.nl), a partnership between Cito (www.cito.com) and the University of Twente (www.universiteittwente.nl/en).