An Examination of the Unique Contributions of Body Image and Internalized Weight Bias to Psychological Well-Being Outcomes.

High correlations between measures of internalized weight bias (IWB) and body image (BI) have resulted in concerns that IWB is conceptually redundant with BI. This investigation examined the contribution of the unique variance of BI and IWB on three important, weight-related factors: self-esteem, depressive symptoms, and body shame. The study included 403 participants recruited through a Qualtrics research panel. Participants were required to be aged 18 + and have a BMI > 25. The sample contained three equally represented, self-identified racial/ethnic groups: Black non-Hispanic (N = 140), Hispanic (N = 133), and White non-Hispanic (N = 130). When BI was entered in the first step of the regression model, it accounted for 14-40% of the variance in various models; the addition of IWB in step two contributed 11-18% of unique variance. By contrast, when IWB was entered in the first step, it accounted for 25-56% of the variance in various models, with the addition of BI contributing between 0% and 2% unique variance. Therefore, even with a high correlation among the constructs of IWB and BI, IWB was able to contribute unique variance in predicting depressive symptoms, self-esteem, and body shame, and is not redundant with the construct of BI.