Spanos Samantha, Kenda Andree S, Vartanian Lenny R
School of Psychology, UNSW Australia, Sydney, NSW 2052, Australia.
School of Psychology, UNSW Australia, Sydney, NSW 2052, Australia.
Eat Behav. 2015 Jan;16:40-2. doi: 10.1016/j.eatbeh.2014.10.007. Epub 2014 Nov 1.
Research has shown that the bigger the portion that people are served, the more food they eat; this phenomenon is referred to as the portion-size effect. Providing objective serving-size information on food products has been shown to reduce the influence of external food cues on people's eating behavior. The current study examined whether providing objective serving-size information would also reduce the portion-size effect. 100 female participants were served either a small or large portion of pizza in the context of a taste test. The large portion was either unlabeled, labeled as "Contains 2 servings," or labeled as "Contains 4 servings." Food intake was lower when the large portion was labeled "Contains 4 servings" compared to when it was labeled "Contains 2 servings." Moreover, participants' intake in the large portion/4 servings condition was statistically similar to the intake of participants in the small portion condition. Thus, the standard portion-size effect was observed when the large portion was unlabeled or was labeled as "Contains 2 servings," but not when the large portion was labeled as "Contains 4 servings". These findings suggest that providing serving-size information can reduce the portion-size effect, but that the specific content (and not just the presence) of serving-size information is important in determining food intake.
研究表明，人们所获食物分量越大，吃得就越多；这种现象被称为分量大小效应。在食品上提供客观的分量信息已被证明能减少外部食物线索对人们饮食行为的影响。当前的研究考察了提供客观的分量信息是否也会减少分量大小效应。在一次口味测试中，给100名女性参与者分别提供了一小份或一大份披萨。大份披萨要么没有标签，要么标有“含两份”，要么标有“含四份”。与标有“含两份”相比，当大份披萨标有“含四份”时，食物摄入量更低。此外，在大份/四份的情况下参与者的摄入量与小份情况下参与者的摄入量在统计学上相似。因此，当大份披萨没有标签或标有“含两份”时，观察到了标准的分量大小效应，但当大份披萨标有“含四份”时则没有。这些发现表明，提供分量信息可以减少分量大小效应，但分量信息的具体内容（而不仅仅是其存在）在决定食物摄入量方面很重要。
