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Evidence of Validity and Reliability of the Gratitude Scale (G-20)

Abstract

This study aimed to provide evidence of validity and reliability of the Gratitude Scale (G-20) for the Brazilian adult population. Specifically, the study sought to verify the questionnaire’s structure using confirmatory factor analysis, explore the scale’s internal consistency, and establish concurrent and convergent criteria validities. This was a quantitative, correlational study with a cross-sectional design. The convenience sample comprised 348 adults between 18 and 59 years old from all five Brazilian regions. The instruments used were a sociodemographic data questionnaire, G-20, GQ-6, DASS-21, PANAS, and P-DURELL. The total scale demonstrated satisfactory reliability (α = 0.92 and Ω = 0.71) across all dimensions of the instrument. Furthermore, analysis of the data adjustment for the four-factor structure showed an acceptable fit for the model (RMSEA = 0.068, CFI = 0.956, and TLI = 0.949) and significant correlations between the instruments were predominantly observed.

Keywords:
psychometrics; adult; positive psychology

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
E-mail: revistapsico@usf.edu.br