Department of Health Sciences and the EMGO Institute for Health and Care Research, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
J Nutr Educ Behav. 2010 Nov-Dec;42(6):422-6. doi: 10.1016/j.jneb.2010.02.002.
To assess what portion size labeling format is most promising in helping consumers selecting appropriate soft drink sizes, and whether labeling impact depends on the size portfolio.
An experimental study was conducted in fast-food restaurants in which 2 labeling formats (ie, reference portion size and small/medium/large labels) were compared to a control condition, and 2 size ranges were assessed. The main outcome variable was participants' intended soft drink size choice. Stimulus material was presented through photographs.
There was a statistical trend for reference portion size labeling increasing the likelihood to choose small sizes (n=158, odds ratio=2.55, P=.06, confidence interval: 0.84-7.70).
Reference portion size labeling is potentially most promising in reducing large portion size preferences. More research assessing the effectiveness of reference portion size labeling (combined with pricing strategies) on actual choices and consumption behavior in a realistic setting is recommended.
评估哪种份量标签格式最有助于消费者选择合适的软饮料份量，以及标签的影响是否取决于份量组合。
在快餐店进行了一项实验研究，将两种标签格式（即参考份量标签和小/中/大标签）与对照条件进行了比较，并评估了两种份量范围。主要观察变量是参与者选择软性饮料的预期份量。刺激材料通过照片呈现。
参考份量标签增加选择小份量的可能性呈现统计学趋势（n=158，优势比=2.55，P=.06，置信区间：0.84-7.70）。
参考份量标签在减少大份量偏好方面具有潜在的最大优势。建议进行更多研究，评估参考份量标签（结合定价策略）对实际选择和实际环境中消费行为的有效性。
