title: Confirmatory factor analysis of different versions of the Body Shape Questionnaire applied to Brazilian university students.
abstract: This study aimed at evaluating the validity, reliability, and factorial invariance of the complete (34-item) and shortened (8-item and 16-item) versions of the Body Shape Questionnaire (BSQ) when applied to Brazilian university students. A total of 739 female students with a mean age of 20.44 (standard deviation=2.45) years participated. Confirmatory factor analysis was conducted to verify the degree to which the one-factor structure satisfies the proposal for the BSQ's expected structure. Two items of the 34-item version were excluded because they had factor weights (λ)<40. All models had adequate convergent validity (average variance extracted=.43-.58; composite reliability=.85-.97) and internal consistency (α=.85-.97). The 8-item B version was considered the best shortened BSQ version (Akaike information criterion=84.07, Bayes information criterion=157.75, Browne-Cudeck criterion=84.46), with strong invariance for independent samples (Δχ(2)λ(7)=5.06, Δχ(2)Cov(8)=5.11, Δχ(2)Res(16)=19.30).
authors.affiliation: Departamento de Alimentos e Nutrição, Faculdade de Ciências Farmacêuticas de Araraquara, Universidade Estadual Paulista-UNESP, Rod. Araraquara-Jaú, km 01, Araraquara, São Paulo, Brazil.
authors.forename: Wanderson Roberto
authors.initials: WR
authors.lastname: da Silva
authors.affiliation: Departamento de Alimentos e Nutrição, Faculdade de Ciências Farmacêuticas de Araraquara, Universidade Estadual Paulista-UNESP, Rod. Araraquara-Jaú, km 01, Araraquara, São Paulo, Brazil.
authors.forename: Juliana Chioda Ribeiro
authors.initials: JC
authors.lastname: Dias
authors.affiliation: Departamento de Ciências Psicológicas e Unidade de Investigação em Psicologia e Saúde-ISPA-IU, Rua Jardim do Tabaco, n° 34, 1149-041, Lisboa, Portugal.
authors.forename: João
authors.initials: J
authors.lastname: Maroco
authors.affiliation: Departamento de Alimentos e Nutrição, Faculdade de Ciências Farmacêuticas de Araraquara, Universidade Estadual Paulista-UNESP, Rod. Araraquara-Jaú, km 01, Araraquara, São Paulo, Brazil. Electronic address: jucampos@fcfar.unesp.br.
authors.forename: Juliana Alvares Duarte Bonini
authors.initials: JA
authors.lastname: Campos
mesh_terms: D000328:Adult; D001828:Body Image / Q000523:psychology*; D001938:Brazil; D003430:Cross-Sectional Studies; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D010549:Personal Satisfaction; D011594:Psychometrics; D015203:Reproducibility of Results; D013334:Students / Q000523:psychology* / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires; D055815:Young Adult
keywords: Body image; Body shape; Body shape Questionnaire; Reliability; Scales; Validation study