Pechey Rachel, Couturier Dominique-Laurent, Hollands Gareth J, Mantzari Eleni, Zupan Zorana, Marteau Theresa M
Behaviour and Health Research Unit, Institute of Public Health, University of Cambridge, Cambridge, UK.
BMC Res Notes. 2017 Aug 1;10(1):287. doi: 10.1186/s13104-017-2610-0.
Wine glass size may influence perceived volume and subsequently purchasing and consumption. Using a larger glass to serve the same portions of wine was found to increase wine sales by 9.4% (95% CI 1.9, 17.5) in a recent study conducted in one bar. The current study aimed to replicate this previous work in two other bars using a wider range of glass sizes. To match the previous study, a repeated multiple treatment reversal design, during which wine was served in glasses of the same design but different sizes, was used. The study was conducted in two bars in Cambridge, England, using glass sizes of 300, 370, 510 ml (Bar 1) and 300 and 510 ml (Bar 2). Customers purchased their choice of a 750 ml bottle, or standard UK measures of 125, 175 or 250 ml of wine, each of which was served with the same glass.
Bar 1: Daily wine volume (ml) purchased was 10.5% (95% CI 1.0, 20.9) higher when sold in 510 ml compared to 370 ml glasses; but sales were not significantly different with 300 ml vs. 370 ml glasses (6.5%, 95% CI −5.2, 19.6) [corrected]. Bar 2 Findings were inconclusive as to whether daily wine purchased differed when using 510 ml versus 300 ml glasses (-1.1%, 95% CI -12.6, 11.9). These results provide a partial replication of previous work showing that introducing larger glasses (without manipulating portion size) increases purchasing. Understanding the mechanisms by which wine glass size influences consumption may elucidate when the effect can be expected and when not. Trial registration This study is a replication study, based on the procedure set out in the trial registration for the study that it attempts to replicate (ISRCTN registry: ISRCTN12018175).
酒杯大小可能会影响人们对酒量的感知，进而影响购买和消费行为。在最近一项针对一家酒吧的研究中发现，用更大的酒杯来盛装相同分量的葡萄酒，葡萄酒销量增长了9.4%（95%置信区间为1.9%，17.5%）。本研究旨在使用更广泛的酒杯尺寸，在另外两家酒吧重复此前的研究。为了与之前的研究相匹配，采用了重复多处理反转设计，在此期间，用设计相同但尺寸不同的酒杯来盛装葡萄酒。该研究在英国剑桥的两家酒吧进行，酒吧1使用的酒杯尺寸为300、370、510毫升，酒吧2使用的酒杯尺寸为300和510毫升。顾客可以选择购买750毫升一瓶的葡萄酒，或者英国标准量的125、175或250毫升的葡萄酒，每种酒都用相同的酒杯盛装。
酒吧1：与370毫升的酒杯相比，用510毫升的酒杯售卖时，每日购买的葡萄酒量（毫升）高出10.5%（95%置信区间为1.0%，20.9%）；但300毫升和370毫升的酒杯之间的销量没有显著差异（6.5%，95%置信区间为-5.2%，19.6%）[已校正]。酒吧2的研究结果对于使用510毫升和300毫升的酒杯时每日购买的葡萄酒量是否存在差异尚无定论（-1.1%，95%置信区间为-12.6%，11.9%）。这些结果部分重复了此前的研究，表明引入更大的酒杯（不改变分量大小）会增加购买量。了解酒杯大小影响消费的机制，可能有助于阐明何时会出现这种效果，何时不会。试验注册本研究是一项重复研究，基于其试图重复的研究在试验注册中列出的程序（国际标准随机对照试验编号注册库：ISRCTN12018175）。
