School Achievement Test: evidence of validity of the writing subtest

Claudia Hofheinz Giacomoni Marcia de Lima Athayde Cristian Zanon Lilian Milnitsky Stein About the authors

The School achievement test (TDE) (Stein, 1994) assesses learning broadly through three subtests: reading, writing and arithmetic. The goal of this study was to evaluate the psychometric properties of the Writing Subtest, to evaluate the internal structure, items difficulty and discrimination, using Item response theory (IRT). The sample consisted of data from surveys conducted in four Brazilian states (N=1831). Results indicated that the writing subtest presents: (a) evidence of unidimensionality, (b) is composed by items of average difficulty and (c) with high discrimination capability. Moreover, it was observed that the Subtests discriminate satisfactorily students between first and third grade and, less appropriately, students from fourth, fifth and sixth grade. This set of results indicates that the Subtest presents evidence of validity, but requires refinement.

written language; test validity; item response theory

Universidade de São Francisco, Programa de Pós-Graduação Stricto Sensu em Psicologia R. Waldemar César da Silveira, 105, Vl. Cura D'Ars (SWIFT), Campinas - São Paulo, CEP 13045-510, Telefone: (19)3779-3771 - Campinas - SP - Brazil