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Reanalyzing the DISMAS Test Data: Comparing IRT and CTT Based Estimates of the Error of Measurement

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14230%2F14%3A00076015" target="_blank" >RIV/00216224:14230/14:00076015 - isvavai.cz</a>

  • Result on the web

    <a href="http://www.itc2014ss.com/uploads/Libro%20grab%20CD%20Ong.pdf" target="_blank" >http://www.itc2014ss.com/uploads/Libro%20grab%20CD%20Ong.pdf</a>

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Reanalyzing the DISMAS Test Data: Comparing IRT and CTT Based Estimates of the Error of Measurement

  • Original language description

    DISMAS test (Traspe &amp; Skalkova, 2013) is an original Czech assessment tool for the diagnosis of the structure of math disability in children in grades 1?5. It consists of five main areas divided into 14 unidimensional subtests and it was developed and standardized using classical test theory. Authors verified validity. Subtests? correlations with WISC-III were low, but significant, differences between normal and clinical population were high and significant for all grades. Regardless the high validity, reliability seemed to be poor ? Cronbach alpha ranged from .44 to .95 on subtest level, on the test level from .69 to .76 depending on the grade level. The aim of this paper is to show why. We questioned the adequacy of CTT and internal consistency as a method for estimating reliability in this case. That is why we applied simple Rasch model and Partial Credit Rasch model to reanalyze the data.

  • Czech name

  • Czech description

Classification

  • Type

    O - Miscellaneous

  • CEP classification

    AN - Psychology

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    S - Specificky vyzkum na vysokych skolach

Others

  • Publication year

    2014

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů