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The current study of 151 college men explored weight-related factors that contribute to depressive symptoms among undergraduate men using structural equation modeling (SEM). Results of SEM supported the hypothesis that perceived negative messages about one's body and body dissatisfaction were significant mediators of the relationship between BMI and depressive symptoms. Moreover, social connectedness and academic self-concept were significant moderators of the relationship between body dissatisfaction and depressive symptoms. Although self-esteem was not a significant moderator, it was significantly related to body dissatisfaction, despite the men's magnitude of perceived body pressures. These findings inform therapeutic work with college men, signifying the importance of improving the quality of their relationships in family and social systems to reduce both depressive symptoms and body dissatisfaction. Furthermore, advocacy programming to counter body related pressure from media, societal systems, and other people would likely benefit college men struggling with body dissatisfaction and depressive symptoms.

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Research on perspective taking generally points to positive outcomes, but a small and growing body of literature highlights conditions where perspective taking can instead lead to undesirable outcomes. The goal of this dissertation study is to test a model of how taking the perspective of someone who struggles to control food consumption may negatively influence prejudice and discrimination toward heavy people. My model predicts that taking the perspective of someone who is effortfully trying not to eat, which requires the use of self-regulatory processes, vicariously depletes the perspective-taker’s own self-regulatory capacity. Whether that depletion leads to greater expressions of prejudice and discrimination toward heavy people depends on whether the person has high or low levels of implicit prejudice toward heavy people, and how internally or externally motivated the person is to control weight prejudice. Study participants were randomly assigned to read one of three first-person diary entries about a person in a social context where food was present. The degree to which the food described in the diary entry was appetizing, and whether the person was hungry and tempted to eat the food was manipulated. Half of the participants were instructed before reading the diary entry to take the perspective of the person in the story, while the other half were instructed to simply read the diary entry. Self-regulatory capacity was measured and tested as a mediator between perspective taking and both prejudice and discrimination. Effort and individual differences in implicit attitudes about weight and motivation to control weight prejudice were measured and tested as moderators in the model. Results did not support the primary study model hypotheses.

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Obesity research remains a high priority worldwide, given the sustained high levels of obesity (body mass index ≥30 kg/m2) and class III obesity (body mass index ≥40 kg/m2) across many demographic groups. One component of obesity research is the study of how diet can contribute to obesity, and thus it is crucial to evaluate how existing dietary assessment methods perform for people with obesity, and to develop or refine methods to enhance their accuracy. Researchers should be prepared to include more individuals with obesity and class III obesity, a growing demographic, in studies that assess dietary intake. With the inclusion of these groups, it is vital to consider the potential impact of weight bias and weight stigma on dietary research. Weight bias is negative attitudes and stereotypes about people with obesity, while weight stigma is how these attitudes collectively devalue people with obesity, which could result in acts of discrimination. This dissertation: 1) defined the issues of weight bias and weight stigma, and how they affect dietetics practice, including research, 2) determined the representation of participants with class III obesity in studies validating self-reported measures of dietary assessment using doubly-labeled water, and 3) explored how weight bias and weight stigma might impact misreporting of energy intake among people with overweight and obesity. Findings include that: 1) weight bias and weight stigma are important issues when working with people with obesity, and dietetics professionals can address these in many areas of practice; 2) in studies validating self-reported dietary assessment methods using doubly-labeled water, people with class III obesity are underrepresented, and thus the validity of existing methods to assess diet among people with class III obesity requires further research; 3) in a sample of participants with self-reported overweight and obesity, previous experiences of weight stigma were common, though internalized weight bias, weight bias toward others, and experiences of weight stigma were not predictive of the validity of energy intake reporting. Researchers should consider the potential impact of weight stigma on recruitment, retention, and participant experience when working with participants with obesity. / Doctor of Philosophy / One part of obesity research is the study of how food intake can contribute to obesity. It is crucial to evaluate how well existing methods perform that measure what and how much people eat, especially in people with obesity. As obesity levels rise, researchers should be prepared to include more people with obesity (body mass index ≥30 kg/m2) and class III obesity (body mass index ≥40 kg/m2) in studies that measure dietary intake. When including people with obesity in studies, it is important to consider the potential impact of weight bias and weight stigma on nutrition research. Weight bias is the idea of negative attitudes and stereotypes about people with obesity, while weight stigma is how these attitudes collectively devalue people with obesity. This dissertation 1) defined the issues of weight bias and weight stigma, and how they affect dietetics practice, including nutrition research, 2) determined the representation of people with class III obesity in studies testing the accuracy of methods collecting information about food intake and 3) explored how weight bias and weight stigma might affect how accurately people with overweight and obesity report the number of calories that they eat. This work found: 1) weight bias and weight stigma are important emerging issues when working with people with obesity, and dietetics professionals can address weight bias and weight stigma in many areas of practice; 2) in studies testing the accuracy of measures that collect food information, people with class III obesity are underrepresented, and more research is needed to determine how accurate these measures are in this group; and 3) in a group of people with overweight and obesity, previous experiences of weight stigma were common, though internalized weight bias, weight bias toward others, and experiences of weight stigma did not predict how well a person reported their calorie intake. Future studies should include more people with class III obesity. Researchers should consider how weight stigma might affect a person's willingness to participate in nutrition studies. Minimizing weight stigma in research may decrease participation barriers for people with obesity in research about nutrition, weight, and health.

Objective: Adolescents with binge-eating disorder (BED) are suffering from weight teasing and, as found in adults with BED, are likely to internalize weight bias. Weight teasing by mothers accounts for psychopathology in overweight, but sources of stigmatization are largely unknown in BED. This study sought to address familial weight bias in adolescents with overweight and BED by examining adolescents’ perceived parental weight teasing and weight bias internalization in relation to their eating disorder psychopathology and maternal stigmatizing attitudes and beliefs. Method: Adolescents with overweight and BED (BED; n = 40) were compared to a socio-demographically matched group with overweight only (OW) and a normal-weight control group (NW; each n = 25). They filled out the Perception of Teasing Scale, with parents as the source of teasing, the Weight Bias Internalization Scale and the Eating Disorder Examination-Questionnaire. Their mothers filled out the Attitudes Toward and Beliefs about Obese Persons Scales. Results: Significantly higher perceived parental weight teasing and weight bias internalization were found in BED compared to OW and NW. Maternal stigmatizing attitudes and beliefs did not differ between groups and were not correlated with adolescents’ perceptions of being stigmatized. Perceived parental weight teasing predicted adolescents’ eating disorder psychopathology, however, this association was fully mediated by weight bias internalization. Discussion: These results indicate that adolescents with overweight and BED perceive weight teasing in their own families. As we found no significant association between adolescents’ perceptions of being stigmatized and maternal stigmatizing attitudes, future research should examine weight-related parent-child interaction or implicit measures of stigmatizing attitudes.