Blair Johnna, Luo Yuhan, Ma Ning F, Lee Sooyeon, Choe Eun Kyoung
Pennsylvania State University, State College, Pennsylvania, USA.
University of Maryland, College Park, Maryland, USA.
AMIA Annu Symp Proc. 2018 Dec 5;2018:252-261. eCollection 2018.
When a self-monitoring tool is used to enhance behavior awareness, the tool should afford reflection by design. This work examines the "valence of meal" (i.e., healthy versus unhealthy meal) as a means to support reflection on a person's diet in photo-based meal tracking. To study the effect of imposing valence on meal tracking, we designed two conditions-one focusing on capturing healthy meals, the other capturing unhealthy meals-and conducted a between-subjects diary study with 22 college students over four weeks. According to their group assignment, participants tracked only healthy or unhealthy meals by taking photos and rationalizing in texts why their meals were particularly healthy or unhealthy. We found that participants in both groups became more aware of their diet, but the valence of meal influenced them differently regarding their meal assessment, self-reflection, and food choice intention. We discuss ways to leverage valence in designing reflective meal tracking systems.
当使用自我监测工具来增强行为意识时，该工具应在设计上便于反思。这项研究将“膳食的效价”（即健康膳食与不健康膳食）作为一种手段，以支持基于照片的膳食跟踪中对个人饮食的反思。为了研究在膳食跟踪中施加效价的影响，我们设计了两种情况——一种侧重于拍摄健康膳食，另一种拍摄不健康膳食——并对22名大学生进行了为期四周的组间日记研究。根据他们的分组，参与者通过拍照并在文字中阐述其膳食特别健康或不健康的原因，仅跟踪健康或不健康的膳食。我们发现，两组参与者对自己的饮食都有了更强的意识，但膳食的效价在膳食评估、自我反思和食物选择意图方面对他们的影响有所不同。我们讨论了在设计反思性膳食跟踪系统时利用效价的方法。
