Adaptation and validation of the Dietarian Identity Questionnaire (DIQ) into the Spanish context

  1. Cristina Chinea Montesdeoca
  2. Ernesto Suárez Rodríguez
  3. Bernardo Hernández Ruiz
  4. Isabel Duarte Lores
Journal:
International Journal of Social Psychology, Revista de Psicología Social

ISSN: 0213-4748

Year of publication: 2021

Volume: 36

Issue: 3

Pages: 510-543

Type: Article

DOI: 10.1080/02134748.2021.1940703 DIALNET GOOGLE SCHOLAR

Abstract

The aim of this study is to adapt and validate the Dietarian Identity Questionnaire (DIQ) into the Spanish context. In an initial study, a confirmatory factor analysis was performed, obtaining good validity and goodness-of-fit indices (CMIN/DF = 2.026; CFI = .976; NNFI = .972; SRMR = .054 and RMSEA = .057). In a second study, evidence of validity based on the relationship with other variables was analysed using the ‘Meaning of Food in Life’ questionnaire. Correlations were made and differences between people with a vegan (N = 43), vegetarian (N = 44) and omnivorous (N = 115) diet were analysed. The results indicate that vegans and vegetarians differ from omnivores in all identity factors (p = ≤ .001). In addition, differences were found between vegans and vegetarians in the Public Regard (p = .035), Outgroup Regard (p = .036) and Moral Motivation (p = .036) factors. DIQ is a good instrument that can be used in studies on food choices and sustainability.