Negative Affect as a Mediator Between Exposure to Fitspiration and Thinspiration and Disordered Eating Behaviors: An Ecological Momentary Assessment Study

IF 4.7 2区 医学 Q1 NUTRITION & DIETETICS
Kara A. Christensen Pacella, Kelsie T. Forbush, Yiyang Chen, Maegan B. Nation, Christopher C. Cushing, Rebecca E. Swinburne Romine
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引用次数: 0

Abstract

Objective

Although social media use, such as Instagram, has been associated with ED pathology, mechanisms connecting social media use to disordered eating behaviors (DEBs) remain largely unevaluated. Based on Dual Process, Tripartite, and Affect Regulation models of ED pathology, we proposed a moderated mediation model evaluating impacts of exposure to fitspiration/thinspiration on Instagram.

Method

We evaluated a hypothesized pathway from exposure to fitspiration/thinspiration (i.e., ED-salient content) on Instagram to disordered eating mediated by negative affect and tested individual differences in weight bias internalization, trait self-esteem, and trait self-comparison as moderators. We recruited 173 undergraduate women who reported engaging in DEBs on average at least once per week over the past 3 months. Participants completed a seven-day ecological momentary assessment protocol, during which they reported their ED-salient content exposure on Instagram, affect, and engagement in DEBs.

Results

Multilevel modeling was used to assess moderated mediation. Negative affect partially mediated associations between viewing ED-salient content and subsequent engagement in objective binge eating and restricting but did not mediate the pathway to purging or excessive exercise. Higher weight bias internalization intensified the association between viewing ED-salient content and negative affect.

Discussion

The association between viewing ED-salient content and engaging in objective binge eating and restricting may be a partial consequence of elevated negative affect; however, effects were small. Individuals with higher weight bias internalization may be more vulnerable to negative consequences from viewing ED-salient content. Findings suggested that reducing negative affect responses (e.g., via emotion regulation) could reduce negative consequences of viewing ED-salient content.

Abstract Image

消极情绪是 "健美启示 "和 "瘦身启示 "与饮食紊乱行为之间的中介:生态学瞬间评估研究》。
目的:尽管社交媒体(如 Instagram)的使用与 ED 病理学有关,但社交媒体的使用与饮食失调行为(DEB)之间的关联机制在很大程度上仍未得到评估。基于ED病理学的双重过程模型、三方模型和情感调节模型,我们提出了一个调节中介模型,评估在Instagram上接触fitpiration/thinspiration的影响:我们评估了从接触 Instagram 上的 "合身"/"励志"(即诱发 ED 的内容)到由负性情感介导的饮食失调的假设路径,并测试了体重偏差内化、特质自尊和特质自我比较作为调节因子的个体差异。我们招募了 173 名本科女生,她们表示在过去 3 个月中平均每周至少进行一次 DEB。参与者完成了一项为期七天的生态瞬间评估协议,在此期间,她们报告了自己在 Instagram 上的 ED 信号内容暴露、情感以及参与 DEBs 的情况:结果:多层次建模用于评估调节中介。消极情绪在部分程度上调节了观看对性欲有愉悦感的内容与随后参与客观暴饮暴食和限制饮食之间的关联,但并没有调节清肠或过度运动的途径。体重偏差内化程度越高,观看对性欲有愉悦感的内容与负面情绪之间的关联性就越强:讨论:观看对性欲有吸引力的内容与客观暴饮暴食和限制饮食之间的关联可能是负面情绪升高的部分结果;然而,影响很小。体重偏差内化程度较高的个体可能更容易因观看具有教育价值的内容而受到负面影响。研究结果表明,减少消极情绪反应(如通过情绪调节)可减少因观看具有教育价值的内容而产生的消极后果。
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来源期刊
CiteScore
10.00
自引率
12.70%
发文量
204
审稿时长
4-8 weeks
期刊介绍: Articles featured in the journal describe state-of-the-art scientific research on theory, methodology, etiology, clinical practice, and policy related to eating disorders, as well as contributions that facilitate scholarly critique and discussion of science and practice in the field. Theoretical and empirical work on obesity or healthy eating falls within the journal’s scope inasmuch as it facilitates the advancement of efforts to describe and understand, prevent, or treat eating disorders. IJED welcomes submissions from all regions of the world and representing all levels of inquiry (including basic science, clinical trials, implementation research, and dissemination studies), and across a full range of scientific methods, disciplines, and approaches.
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