Disordered eating and body change behaviours: support for the Tripartite Influence Model among Brazilian male university students

Abstract The Tripartite Influence Model posits that sociocultural influences mediated by internalization and social comparison are predictors of disordered eating and body change behaviours. This study aimed to test the Tripartite Influence Model among Brazilian male university students, which has not been tested yet. 707 undergraduate students of the five Brazilian regions, completed measures of sociocultural influences, internalization, social comparison, body and muscularity dissatisfaction, disordered eating and body change behaviours. Structural equation modelling analyses showed good model-fitting. Parental influence was related to internalization, while peer influence with social comparison. Media influences were related to both internalization and social comparison. Internalization and social comparison are mediating variables that are related to body dissatisfaction and muscularity dissatisfaction. Finally, muscularity dissatisfaction was associated with body change behaviours.

摘要 三方影响模型（Tripartite Influence Model）提出，经由内化与社会比较介导的社会文化影响，是失调性进食与体型改变行为的预测因子。本研究旨在检验此前尚未得到验证的、针对巴西男性大学生群体的三方影响模型。来自巴西五大区域的707名本科生完成了社会文化影响、内化、社会比较、身体与肌肉量不满、失调性进食及体型改变行为的相关测评。结构方程建模分析显示模型拟合效果优异。父母影响与内化相关，而同侪影响则与社会比较相关。媒体影响同时与内化及社会比较存在关联。内化与社会比较作为中介变量，与身体不满和肌肉量不满相关。最终，肌肉量不满与体型改变行为存在相关性。