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ERIC Number: EJ896130
Record Type: Journal
Publication Date: 2010
Pages: 16
Abstractor: As Provided
Reference Count: 33
ISSN: ISSN-0211-2159
Assessing Short-Term Individual Consistency Using IRT-Based Statistics
Ferrando, Pere J.
Psicologica: International Journal of Methodology and Experimental Psychology, v31 n2 p319-334 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 well-known "lz" person-fit index. The rationale for using and interpreting the proposed statistic is discussed, and an adapted standardized residual at the item level is also proposed to obtain clues about the possible causes of the detected inconsistency. The procedure is illustrated with a real-data example and a parallel simulation in the personality domain. (Contains 2 figures.)
University of Valencia. Dept. Metodologia, Facultad de Psicologia, Avda. Blasco Ibanez 21, 46010 Valencia, Spain. Tel: +34-96-386-4100; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A