Estimation of Score Distributions for TOEFL Concordance Tables.Reportar como inadecuado

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The purpose of this paper is to describe the techniques used in establishing the concordance tables between the Test of English as a Foreign Language (TOEFL), paper and pencil (P&P), and computer-based testing (CBT) sections and total reported score scales. Listening, reading, and composite structure and essay scores plus a total score are reported in the CBT on scales that are nonoverlapping with the P&P scales. The concordance study was conducted to make it possible to equate the CBT test to the P&P test. Examinees (n=8,387) took the CBT soon after their P&P tests. Responses from both were used to estimate the conditional distributions of the CBT section scores and the observed Essay scores, given the P&P scores. Projected population distributions were then obtained for the CBT scores and observed Essay scores. Given reference forms for the CBT, the CBT and Essay score distributions were projected to reference-test observed score distributions that then served as the basis for concordance functions. Concordance tables were successfully established between the CBT and the P&P reported score scales for TOEFL. It might be argued that the researchers could have used the study group alone to establish the concordance relationships. However, because of the self-selection of the examinees participating in the study, their P&P score distributions were clearly different from those of the population, and it was determined that more sophisticated methods needed to be employed. (Author/SLD)

Descriptors: Computer Assisted Testing, English (Second Language), Estimation (Mathematics), Scaling, Scores, Statistical Distributions, Tables (Data)

Autor: Jiang, Hai


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