Psychometric properties of the Subjective Well-Being Scale using the Rating Scale Model

Abstract

Positive Psychology has gained momentum in the international scenario, and one of its first constructs that has been studied in Brazil is subjective well-being. This study aims to verify the Escala de Bem-Estar Subjetivo (Subjective Well-Being Scale) Scale’s psychometric properties by independently applying the Item Response Theory’s rating scale model to each scale component. Evidence of validity was verified based on internal structure and reliability coefficients, which were assessed through internal consistency. In order to do so, a subject database consisting of 182 male and female college students aged between 18 and 57 years old was used (mean age of 24.6 years). Results showed evidence of unidimensionality of all three factors of the scale. In addition, only one of the factors’ response category did not have the expected results. Participants tended to choose mostly Positive Affect items, and negative affect had the lowest theta average. The implications of these findings to the instrument’s psychometric quality are thoroughly discussed.

Internal validity evidence of a knowledge questionnaire on alcohol use, abuse and dependence and associated questions

“…However, considering the standard definition of low-risk use, according to WHO ( 20 ) , the authors agreed to keep this item in the standard category of use, even though it is directly related to psychosocial approaches. Moreover, “safe drinking” was replaced by “low-risk drinking”, according to available scientific evidence ( 26 ) .…”

Evidências de validade interna de um questionário de conhecimento sobre o uso, abuso e dependência de álcool e questões associadas

“…Entretanto, considerando a definição padrão de uso de baixo risco, conforme a OMS (20) , os autores concordaram em manter esse item na categoria padrão de uso, mesmo estando diretamente relacionada com as abordagens psicossociais. Além disso, substituiu-se "beber seguro" por "beber de baixo risco", de acordo com a evidência científica disponível (26) .…”