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Download full textFerrando, Pere J. – Psicologica: International Journal of Methodology and Experimental Psychology, 2015
Test-retest studies for assessing stability and change are widely used in different domains and allow improved or additional individual estimates of interest to be obtained. However, if these estimates are to be validly interpreted the responses given at Time-2 must be free of retest effects, and the fulfilment of this assumption must be…
Descriptors: Item Response Theory, Evaluation Methods, Responses, Testing
Ferrando, Pere J. – Psicologica: International Journal of Methodology and Experimental Psychology, 2010
This article proposes a procedure, based on a global statistic, for assessing intra-individual consistency in a test-retest design with a short-term retest interval. The procedure is developed within the framework of parametric item response theory, and the statistic is a likelihood-based measure that can be considered as an extension of the…
Descriptors: Item Response Theory, Intervals, Psychometrics, Testing
