Department of Psychology, University of Nevada Las Vegas, Las Vegas, NV, United States of America.
Department of Psychology, University of Kansas, Lawrence, KS, United States of America.
Eat Behav. 2023 Aug;50:101767. doi: 10.1016/j.eatbeh.2023.101767. Epub 2023 Jun 8.
Although a growing body of research has examined the impacts of ED-salient content, such as fitspiration and thinspiration, on eating disorder (ED) symptoms, there is less known about the characteristics of who may be at risk for accessing this content on Instagram. Current research is limited by cross-sectional and retrospective designs. This prospective study used ecological momentary assessment (EMA) to predict naturalistic exposure to ED-salient content on Instagram.
Female university students with disordered eating (N = 171, M = 20.23, SD = 1.71, range = 18-25) completed a baseline session, followed by a seven-day EMA protocol, in which they reported on Instagram use and exposure to fitspiration and thinspiration. Mixed-effects logistical regressions were used to predict exposure to ED-salient content on Instagram from four principal components (e.g., behavioral ED symptoms and trait social comparison) controlling for duration of Instagram use (i.e., dose) and day of study.
Duration of use was positively associated with all types of exposure. Purging/cognitive restraint and excessive exercise/muscle building prospectively predicted access to any ED-salient content and fitspiration only. Restricting positively predicted thinspiration only access. Purging/cognitive restraint positively predicted accessing fitspiration and thinspiration (dual exposure). Day of study was negatively associated with any exposure, fitspiration only, and dual exposure.
Baseline ED behaviors were differentially associated with exposure to ED-salient Instagram content; however, duration of use was also a significant predictor. Limiting use of Instagram may be important for young women with disordered eating to reduce probability of encountering ED-salient content.
尽管越来越多的研究探讨了 ED 突出内容（如健身灵感和瘦身灵感）对饮食失调（ED）症状的影响，但对于谁可能有风险在 Instagram 上访问此内容的特征知之甚少。目前的研究受到横断面和回顾性设计的限制。本前瞻性研究使用生态瞬时评估（EMA）预测在 Instagram 上自然接触 ED 突出内容。
患有饮食失调的女大学生（N=171，M=20.23，SD=1.71，范围 18-25）完成基线会话，随后进行为期七天的 EMA 协议，在此期间，他们报告了在 Instagram 上的使用情况以及对健身灵感和瘦身灵感的接触情况。混合效应逻辑回归用于从四个主要成分（例如，行为性 ED 症状和特质社会比较）预测 Instagram 上 ED 突出内容的暴露情况，同时控制 Instagram 使用时长（即剂量）和研究日。
使用时长与所有类型的暴露都呈正相关。清除/认知约束和过度锻炼/肌肉建设前瞻性地预测了对任何 ED 突出内容和健身灵感的访问，仅限制正向预测瘦身灵感的访问。清除/认知约束正向预测访问健身灵感和瘦身灵感（双重暴露）。研究日与任何暴露、仅健身灵感和双重暴露呈负相关。
基线 ED 行为与对 ED 突出的 Instagram 内容的暴露呈不同相关；然而，使用时长也是一个重要的预测因素。限制使用 Instagram 可能对患有饮食失调的年轻女性很重要，以降低遇到 ED 突出内容的概率。
