ECAT-LISTENING: DESIGN AND PSYCHOMETRIC PROPERTIES OF A COMPUTERIZED ADAPTIVE TEST ON ENGLISH LISTENING
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2011
- handle: 10670/1.ntqnlj
- 0214-9915
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Psicothema
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Julio Olea et al., « ECAT-LISTENING: DESIGN AND PSYCHOMETRIC PROPERTIES OF A COMPUTERIZED ADAPTIVE TEST ON ENGLISH LISTENING », Psicothema, ID : 10670/1.ntqnlj
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"In this study, eCAT-Listening, a new computerized adaptive test for the evaluation of English Listening, is described. Item bank development, anchor design for data collection, and the study of thepsychometric properties of the item bank and the adaptive test are described. The calibration sample comprised 1.576 participants. Good psychometric guarantees, the bank is unidimensional, the items are satisfactorily fi tted to the 3-parameter logistic model, and an accurate estimation of the trait level is obtained. As validity evidence, a high correlation was obtained between the estimated trait level and a latent factor made up of the diverse criteria selected. The analysis of the trait level estimation by means of a simulation led us to fi x the test length at 20 items, with a maximum exposure rate of .40."