POLITOMOUS VS. DICHOTOMOUS ITEMS: A METHODOLOGICAL STUDY

  • José Antonio López Pina
Keywords: item format, item analysis, reliability, principal component analysis

Abstract

In this report we compare five response formats for politomous items, from the original format (four categories) to dichotomous format. Different psychometric analysis (item analysis, study of the reliability, principal component analysis and ability analysis) have been done on the five different formats. These psychometric analyses show that two categories can obtain as information as four. Then it is necessary to study the appropriate categories in the items before to apply the test.

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Author Biography

José Antonio López Pina
Universidad de Murcia
Published
24-06-2008
How to Cite
López Pina, J. A. (2008). POLITOMOUS VS. DICHOTOMOUS ITEMS: A METHODOLOGICAL STUDY. Anales De Psicología / Annals of Psychology, 21(2), 339-344. Retrieved from https://revistas.um.es/analesps/article/view/26941
Section
Methodology

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