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Estudo das propriedades psicométricas da versão portuguesa do Interpretation Bias Task (IBT)
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Abstract(s)
Algumas teorias da psicologia cognitiva sugerem que o viés de interpretação desempenha um papel na etiologia de algumas psicopatologias, incluindo a ansiedade social. Também é sugerida a escassez de instrumentos fiáveis que consigam captar este viés, sobretudo em Portugal. Neste contexto, fomos avaliar as propriedades psicométricas da versão portuguesa de um instrumento baseado em tarefas envolvendo cenários ambíguos (Interpretation Bias Task IBT). Este instrumento avalia a tendência para fazer interpretações benignas ou negativas em cenários que remetem para quatro domínios: lesão corporal imediata; doença de longa duração; rejeição social; e, falha de desempenho. A estrutura fatorial do IBT foi avaliada numa amostra de 256 adultos portugueses, tendo-se ainda avaliado a fiabilidade das medidas proporcionadas por este instrumento (consistência interna e estabilidade temporal). Fomos também avaliar a possível associação entre o viés de interpretação e os sintomas de ansiedade social reportados pelos participantes. Os nossos principais resultados sugerem que apenas três dos quatro domínios do modelo original do IBT são diferenciáveis, sendo possível calcular medidas relativamente confiáveis de viés para cada um desses domínios. Obtevese um índice satisfatório de consistência interna. Observámos que uma associação positiva entre os níveis de ansiedade social auto relatada e o número de interpretações malignas no IBT. Verificou-se também quanto mais jovens eram os participantes menos viés de interpretação revelavam face aos cenários do IBT. Em suma, concluímos que a versão portuguesa do IBT se revela adequado para medir o viés de interpretação em adultos portugueses.
Some theories in cognitive psychology suggest that interpretation bias plays a role in the etiology of certain psychopathologies, including social anxiety. There is also an identified scarcity of reliable instruments capable of capturing this bias, particularly in Portugal. In this context, we aimed to assess the psychometric properties of the Portuguese version of a task-based instrument involving ambiguous scenarios, the Interpretation Bias Task (IBT). This instrument evaluates the tendency to make benign or negative interpretations in scenarios related to four domains: immediate bodily injury, long-term illness, social rejection, and performance failure. The factorial analysis structure of the IBT was evaluated in a sample of 256 Portuguese adults, also assessing the reliability of measures provided by this instrument (internal consistency and temporal stability). We also sought to evaluate the potential association between interpretation bias and symptoms of selfreported social anxiety. Our main results suggest that only three of the four domains in the original IBT model are distinguishable, allowing for the calculation of relatively reliable bias measures for each of these domains. A satisfactory index of internal consistency was obtained. We observed a positive association between self-reported levels of social anxiety and the number of negative interpretations in the IBT. Additionally, it was noted that younger participants exhibited less interpretation bias in relation to IBT scenarios. In conclusion, we find that the Portuguese version of the IBT is suitable for measuring interpretation bias in Portuguese adults.
Some theories in cognitive psychology suggest that interpretation bias plays a role in the etiology of certain psychopathologies, including social anxiety. There is also an identified scarcity of reliable instruments capable of capturing this bias, particularly in Portugal. In this context, we aimed to assess the psychometric properties of the Portuguese version of a task-based instrument involving ambiguous scenarios, the Interpretation Bias Task (IBT). This instrument evaluates the tendency to make benign or negative interpretations in scenarios related to four domains: immediate bodily injury, long-term illness, social rejection, and performance failure. The factorial analysis structure of the IBT was evaluated in a sample of 256 Portuguese adults, also assessing the reliability of measures provided by this instrument (internal consistency and temporal stability). We also sought to evaluate the potential association between interpretation bias and symptoms of selfreported social anxiety. Our main results suggest that only three of the four domains in the original IBT model are distinguishable, allowing for the calculation of relatively reliable bias measures for each of these domains. A satisfactory index of internal consistency was obtained. We observed a positive association between self-reported levels of social anxiety and the number of negative interpretations in the IBT. Additionally, it was noted that younger participants exhibited less interpretation bias in relation to IBT scenarios. In conclusion, we find that the Portuguese version of the IBT is suitable for measuring interpretation bias in Portuguese adults.
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Keywords
Viés De Interpretação Características Psicométricas Interpretation Bias Task (IBT) Ansiedade Social