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Applying Item Response Theory in Language Test Item Bank Building

Series:

Gábor Szabó

Item Response Theory, though it has become a widely recognized tool in language testing research, is still not used frequently in practical language assessment projects. This book intends to provide a theoretical overview as well as to give practical guidance concerning the application of IRT in item bank building in a language testing context by presenting a particular project in a higher education setting.

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List of figures and tables 179

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List of figures and tables Figure 1. Stanine scores with corresponding raw score percentages Figure 2. IRT-based relationship of persons and items Figure 3. Item Characteristic Curve representing relationship between ability and probability of correct response Figure 4. Normal ogive ICC Figure 5. Step function ICC Figure 6. Item Characteristic Curve representing relationship between the ability scale and probability of correct response indicating item difficulty level Figure 7. One-parameter ICCs for three items Figure 8. Two-parameter ICCs for three items Figure 9. Three-parameter ICCs for three items Figure 10. Distribution of observed scores in the 1996-1999 versions Figure 11. Common map of persons' ability and items' difficulty in the 1994 UP test Figure 12. Common map of persons' ability and items' difficulty in the 1995 UP test Figure 13. Common map of item's difficulty in the 1994 and 1995 UP tests Figure 14. Common map of persons' ability and items' difficulty in the 1996 UP test Figure 15. Common map of persons' ability and items' difficulty in the 1997 UP test Figure 16. Common map of persons' ability and items' difficulty in the 1998 UP test Figure 17. Common map of persons' ability and items' difficulty in the 1999 UP test Figure 18. Common map of persons' ability in 1995 and items' difficulty in 1999 Figure 19. Map of person fit in the 1994 version of the UP test Figure 20. Map of item fit in the 1994 version of the UP test Figure 21. Map of person fit in...

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