The field of language testing has long led the way in integrative, performance-based assessment. However, the use of technology in language testing has often meant limiting assessment options. We believe computermediated language assessment can enrich opportunities for language learners to demonstrate what they are able to do with their second language. In this paper, we describe the rationale ...

Wedevelop aBayesian binary ItemResponseModel (IRM),whichwedenote as Test Anxiety Model (TAM), for estimating the proficiency scores when individuals might experience test anxiety. We consider order restricted item parameters conditionally to the examinees’ reported emotional state at the testing session.We consider three test anxiety levels: calm, anxious and very anxious. Using simulated data ...

Homomorphic encryption schemes are malleable by design. In this paper, we find different approaches to practical homomorphic encryption schemes. Partial homomorphic encryption schemes, we observe that the main bottleneck of this scheme is that it is capable of or adapted for turning easily from one to another of various tasks. To solve this problem, we propose general approach to improve the ve...

In this paper, we propose several reliable weighting factors based on the speaker’s proficiency level, which can be used to normalize the scaled log-posterior probability (SLPP) to further improve mispronunciation detection at syllable level for Mandarin Chinese. Experiments based on a database consisting of 8000 syllables, pronounced by 40 speakers with varied pronunciation proficiency, shows ...

Proficiency testing is an important ingredient in successful language teaching. However, repeated testing for course placement, over the course of instruction or for certification can be time-consuming and costly. We present the design and validation of the Versant Arabic Test, a fully automated test of spoken Modern Standard Arabic, that evaluates test-takers' facility in listening and speakin...

Proficiency testing is an important ingredient in successful language teaching. However, repeated testing for course placement, over the course of instruction or for certification can be time-consuming and costly. We present the design and validation of the Versant Arabic Test, a fully automated test of spoken Modern Standard Arabic, that evaluates test-takers' facility in listening and speakin...

The study aims to construct a multidimensional computerized adaptive testing (MCAT) system for enhancing the Chinese as second language (CSL) proficiency test. Because currently the major CSL proficiency tests still retain paper-pencil (P&P) test method for testing. Nowadays more advances computer technology is available, project development on the computerized based test (CBT) has been gradual...

While some researchers have questioned the efficacy of corrective feedback (CF), other researchers believe that CF can be effective if implemented through new technology types, including e-portfolio (EP). However, whether EP can be used as a medium of providing CF for language learners at different levels of language proficiency is still unknown. The purpose of the present study, therefore, was...

Toxicological determinations are crucial to coroners' or medical examiners' judgments that drugs are significantly involved in a death. However, differences in laboratory procedures, thoroughness of screening, and limits of detection may result in artifactual differences in the toxicological results and the subsequent interpretations of them. To test this possibility, we conducted a toxicology ...