Introduction: Body comparisons have been implicated in body dissatisfaction and eating disorder development. Ecological momentary assessment (EMA) has been used to capture body comparisons in everyday life; however, the potential for measurement reactivity this approach has on EMA responses has yet to be examined. The present study systematically evaluated measurement reactivity in EMA of body comparisons. Methods: Undergraduate women (N = 75) completed four surveys daily for 11 days; Days 1–4 did not include comparison assessments and Days 5–11 did. Changes were examined in related EMA measures between these time periods and individual difference measures pre- and post-EMA. Results: A within-person MANOVA showed no significant change in the individual difference measures. Multilevel analyses revealed that participants reported fewer comparisons as day of study increased. When they completed EMA with versus without comparison items, they reported fewer occasions of loss of control while eating and less pleasant social company at time of assessment. Discussion: Findings suggest limited concern for reactivity in this approach, though researchers examining body comparisons, loss of control eating, and perceptions of social company should be cautious when interpreting their findings and consider examining reactivity directly. Future research on body comparisons should also consider using run-in periods to improve data quality.

中文翻译：

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评估会改变反应吗？身体比较的生态瞬时评估中测量反应性的检查

简介：身体比较与身体不满和饮食失调的发展有关。生态瞬时评估 (EMA) 已被用于捕捉日常生活中的身体比较；然而，这种方法对 EMA 响应的测量反应性的潜力还有待检验。本研究系统地评估了身体比较 EMA 中的测量反应性。方法：本科女性（N = 75）每天完成四次调查，持续 11 天；第 1-4 天不包括比较评估，第 5-11 天有。检查了这些时间段之间相关 EMA 测量的变化以及 EMA 前后的个体差异测量。结果：人内 MANOVA 显示个体差异测量没有显着变化。多层次分析显示，随着研究天数的增加，参与者报告的比较减少。当他们完成带有与不带有比较项目的 EMA 时，他们报告在评估时吃饭时失去控制的情况更少，社交陪伴也更少。讨论：研究结果表明，这种方法对反应性的关注有限，尽管研究人员检查身体比较、饮食失控和对社会公司的看法时，在解释他们的研究结果时应谨慎，并考虑直接检查反应性。未来关于身体比较的研究还应考虑使用磨合期来提高数据质量。他们报告说，在评估时吃饭时失去控制的情况更少，社交陪伴也更少。讨论：研究结果表明，这种方法对反应性的关注有限，尽管研究人员检查身体比较、饮食失控和对社会公司的看法时，在解释他们的研究结果时应谨慎，并考虑直接检查反应性。未来关于身体比较的研究还应考虑使用磨合期来提高数据质量。他们报告说，在评估时吃饭时失去控制的情况更少，社交陪伴也更少。讨论：研究结果表明，这种方法对反应性的关注有限，尽管研究人员检查身体比较、饮食失控和对社会公司的看法时，在解释他们的研究结果时应谨慎，并考虑直接检查反应性。未来关于身体比较的研究还应考虑使用磨合期来提高数据质量。