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Direct linkKruyen, Peter M.; Emons, Wilco H. M.; Sijtsma, Klaas – International Journal of Testing, 2013
To efficiently assess multiple psychological constructs and to minimize the burden on respondents, psychologists increasingly use shortened versions of existing tests. However, compared to the longer test, a shorter test version may have a substantial impact on the reliability and the validity of the test scores in psychological research and…
Descriptors: Test Length, Psychological Testing, Test Use, Test Validity
Peer reviewedKristof, Walter – Psychometrika, 1971
Descriptors: Cognitive Measurement, Error of Measurement, Mathematical Models, Psychological Testing
Wang, Wen-Chung; Chen, Hsueh-Chu – Educational and Psychological Measurement, 2004
As item response theory (IRT) becomes popular in educational and psychological testing, there is a need of reporting IRT-based effect size measures. In this study, we show how the standardized mean difference can be generalized into such a measure. A disattenuation procedure based on the IRT test reliability is proposed to correct the attenuation…
Descriptors: Test Reliability, Rating Scales, Sample Size, Error of Measurement
