Effect of glass shape on the pouring accuracy of liquid volume

David M Troy, Angela S Attwood, Olivia M Maynard, Nicholas E Scott-Samuel, Matthew Hickman, Andy Woods and Marcus R Munafò

PLOS ONE, 2018, vol. 13, issue 10, 1-11

Abstract: Background: The shape of glassware may exacerbate or counteract biases in perceived volume, which may lead people to misjudge the pouring of alcoholic drinks. The aim of these studies was to investigate the effect of glass shape on the pouring accuracy of liquid volume. Methods: In Study 1, using an online computerised task, participants (n = 211) were asked to pour liquid in glasses in a within-subjects design with factors of glass shape (straight, curved) and requested percentage fullness (10, 20, 25, 30, 40, 50, 60, 70, 75, 80, 90%). Curve estimations were carried out to determine if errors followed a linear or non-linear relationship. In Study 2, in a real world experimental study, participants (n = 96) were asked to pour water to the midpoint of pint glasses in a within-subjects design with one factor of glass shape (straight, curved, tulip, inverted). Differences between poured amounts were analysed using one-way repeated measures ANOVA. Results: In Study 1, participants under-poured in curved glasses compared to straight glasses at all requested amounts. In Study 2, participants under-poured in curved (p

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0204562

DOI: 10.1371/journal.pone.0204562

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