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A Neural Network Approach For Estimating Examinees' Proficiency Levels in Computerized Adaptive Testing

El-Alfy, E.-S.M. and Jafri, S.S. (2007) A Neural Network Approach For Estimating Examinees' Proficiency Levels in Computerized Adaptive Testing. In: THE SIXTH IASTED INTERNATIONAL CONFERENCE ON WEB-BASED EDUCATION.

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This paper studies the potential of using neural network models for estimating examinees' proficiency levels in computerized adaptive testing. Computerized adaptive testing (CAT) has recently become increasingly important to standardized testing. An essential constituent of CAT is the estimation of each examinee proficiency level. Previously, this estimation has been carried out using the maximum likelihood estimator (MLE) or a Bayesian procedure. As being parametric techniques, the quality of estimates strongly depends on some restrictive assumptions. Neural network, with its strong theoretical background and ability to learn and generalize, provides a more flexible non-parametric function approximation and tends to be more efficient in estimation accuracy. It can be used for estimating the proficiency levels of examinees. In this work, several models have been simulated and compared namely multi-layer perceptron (MLP), principal-component analysis (PCA), radial-basis function (RBF) and support-vector machines (SVM). Simulation results reveal that neural-network models are capable of providing good estimates of examinees' proficiecy levels. The accuracy of the classification estimation varies based on the network complexity and the size of the training data set.

Item Type:Conference or Workshop Item (Paper)
Date:March 2007
Date Type:Publication
Divisions:College Of Computer Sciences and Engineering > Information and Computer Science Dept
Creators:El-Alfy, E.-S.M. and Jafri, S.S.
Email:alfy@kfupm.edu.sa, UNSPECIFIED
ID Code:10667
Deposited By:Dr. EL-SAYED EL-ALFY
Deposited On:25 Jun 2008 14:54
Last Modified:12 Apr 2011 13:14

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