Book Details
Format
Paperback / Softback
ISBN-10
0820415731
ISBN-13
9780820415734
Edition
New
Publisher
Peter Lang Publishing Inc
Imprint
Peter Lang Publishing Inc
Country of Manufacture
GB
Country of Publication
GB
Publication Date
Aug 1st, 1992
Print length
196 Pages
Weight
450 grams
Dimensions
16.10 x 23.60 x 0.20 cms
Ksh 6,400.00
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This book explores the appropriateness of Item Response Theory (IRT) in language testing. It investigates the dimensionality of the reading tests of the Cambridge First Certificate of English Test (FCE) and the Test of English as a Foreign Language (TOEFL), and the relative fit of 1, 2, 3 parameter IRT models in which the Rasch model is closely examined. Finding that the Rasch model fails to provide an adequate fit for the data, the study recommends that its predominant use in language testing be re-evaluated. Moreover, the 2 and 3 parameter models fit the data much better than the Rasch model. Finally, it shows that moderate departures from unidimensionality do not necessarily lead to an unacceptable model fit, nor does the use of IRT in test development guarantee that the unidimensionality assumption will be satisfied.
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