Abstract

BLUM, Diego et al. Criteria for eliminating items of a Test of Figural Analogies. Summa psicol. UST (En línea) [online]. 2013, vol.10, n.2, pp. 49-56. ISSN 0718-0446.

This paper describes the steps taken to eliminate two of the items in a Test of Figural Analogies (TFA). The main guidelines of psychometric analysis concerning Classical Test Theory (CTT) and Item Response Theory (IRT) are explained. The item elimination process was based on both the study of the CTT difficulty and discrimination index, and the unidimensionality analysis. The a, b, and c parameters of the Three Parameter Logistic Model of IRT were also considered for this purpose, as well as the assessment of each item fitting this model. The unfavourable characteristics of a group of TFA items are detailed, and decisions leading to their possible elimination are discussed.

Keywords : .

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