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Kim, Sooyeon; Moses, Tim – ETS Research Report Series, 2016
The purpose of this study is to evaluate the extent to which item response theory (IRT) proficiency estimation methods are robust to the presence of aberrant responses under the "GRE"® General Test multistage adaptive testing (MST) design. To that end, a wide range of atypical response behaviors affecting as much as 10% of the test items…
Descriptors: Item Response Theory, Computation, Robustness (Statistics), Response Style (Tests)
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Chen, Haiwen H.; von Davier, Matthias; Yamamoto, Kentaro; Kong, Nan – ETS Research Report Series, 2015
One major issue with large-scale assessments is that the respondents might give no responses to many items, resulting in less accurate estimations of both assessed abilities and item parameters. This report studies how the types of items affect the item-level nonresponse rates and how different methods of treating item-level nonresponses have an…
Descriptors: Achievement Tests, Foreign Countries, International Assessment, Secondary School Students
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Tannenbaum, Richard J.; Wylie, E. Caroline – ETS Research Report Series, 2008
The Common European Framework of Reference (CEFR) describes language proficiency in reading, writing, speaking, and listening on a 6-level scale. In this study, English-language experts from across Europe linked CEFR levels to scores on three tests: the TOEFL® iBT test, the TOEIC® assessment, and the TOEIC "Bridge"™ test.…
Descriptors: Language Tests, Second Language Learning, English (Second Language), Computer Assisted Testing
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Handwerk, Phil – ETS Research Report Series, 2007
Online high schools are growing significantly in number, popularity, and function. However, little empirical data has been published about the effectiveness of these institutions. This research examined the frequency of group work and extended essay writing among online Advanced Placement Program® (AP®) students, and how these tasks may have…
Descriptors: Advanced Placement Programs, Advanced Placement, Computer Assisted Testing, Models