Psychosocial Influence Scale of Fruit and Vegetable Consumption among Adolescents: Adaptation and Factorial Validity

Abstract

Instruments to evaluate psychosocial determinants of fruit and vegetable (F&V) consumption among adolescents are scarce, and the-re appears to be only one instrument – unnamed and unvalidated – that investigates determinants derived from theories of social psychology targe-ting the frequency of F&V consumption among adolescents. The scope of this paper was to present the process of cultural adaptation and factor vali-dation of this instrument al-lowing its use in studies with Brazilian adolescents. The cross-cultu-ral adaptation process was accomplished and the final version – named Psychosocial Influence Scale for Fruit and Vegetable Consumption among Adolescents (PSI-FAVES) – was tested with 429 students (58% female) using McDonald’s omega (ω) reliability and Confirmatory Factor Analysis (CFA) as analytical methods. The final version required refinement and the instrument showed adequate overall reliability (ω=0.86) and good fit of the data to the previously elaborated model (CFI=0.955; TLI=0.951 and RMSEA (90%CI) =0.043 (0.038-0.049)), being the first systemati-cally validated instrument to investigate psychosocial determinants of F&V consumption among adolescents.