Pennsylvania State University, University Park, PA 16802, USA.
Body Image. 2013 Jan;10(1):35-44. doi: 10.1016/j.bodyim.2012.08.006. Epub 2012 Sep 19.
Intensive assessment methods (e.g., Ecological Momentary Assessment [EMA]) are increasingly used to capture body image experiences in daily life. One concern with EMA is multiple assessments may increase reactivity to internal or external cues, potentially biasing measurement. Reactivity to EMA was evaluated in two studies (Study 1: N=63 female undergraduates, Study 2: N=131 women with high body dissatisfaction/disordered eating). Participants completed five daily surveys on handheld computers for 1-2 weeks and body image-related questionnaires at the start and end of each study. Results showed no systematic changes in pre- and post-EMA measures or momentary EMA reports, suggesting women were not reactive to the EMA protocols. Completing 1-2 weeks of EMA does not appear to affect body dissatisfaction, mood, or attitudes in non-clinical or at-risk samples of women. These studies provide evidence that EMA methods can be used to assess real-world body image experiences without undue concern about measurement reactivity.
密集评估方法（例如，生态瞬间评估 [EMA]）越来越多地用于在日常生活中捕捉身体意象体验。EMA 的一个关注点是，多次评估可能会增加对内部或外部线索的反应性，从而可能会对测量产生偏差。在两项研究中评估了对 EMA 的反应性（研究 1：N=63 名女性大学生，研究 2：N=131 名身体不满/饮食失调的女性）。参与者使用手持电脑完成了 1-2 周的 5 天日常调查，以及在每项研究开始和结束时的与身体意象相关的问卷。结果表明，在 EMA 前后测量或瞬间 EMA 报告中没有系统的变化，这表明女性对 EMA 方案没有反应。对于非临床或处于危险中的女性样本，完成 1-2 周的 EMA 似乎不会影响身体不满、情绪或态度。这些研究提供了证据，表明 EMA 方法可用于评估真实世界的身体意象体验，而不必过分担心测量的反应性。
