Cross-cultural adaptation and evidence of validity of the Credibility/Expectatncy Questionnaire

Abstract This study aimed to adapt the Credibility/Expectancy Questionnaire (CEQ) to the Brazilian context, evaluate its psychometric properties, and present the relationships between the credibility-expectation of the treatment and the sociodemographic variables of the sample. Participants included 217 adults, who declared to be were undergoing psychological counseling and were recruited via social media. The CEQ, the Life Orientation Test, and a sociodemographic questionnaire were used. The result of the Exploratory Factor Analysis indicated a one-dimensional structure for the CEQ. To avoid duplication of measurement and for practical purposes, two items were excluded from the final version, therefore the instrument was composed of 4 items in the Brazilian Portuguese version. Cronbach’s alpha was 0.87 and the model fit indices were satisfactory. There was a positive and statistically significant association between the CEQ and the LOT-R. We concluded that the CEQ showed appropriate psychometric characteristics for use in Brazilian samples.