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Effect of glass shape on the pouring accuracy of liquid volume

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

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

Suggested Citation

  • David M Troy & Angela S Attwood & Olivia M Maynard & Nicholas E Scott-Samuel & Matthew Hickman & Andy Woods & Marcus R Munafò, 2018. "Effect of glass shape on the pouring accuracy of liquid volume," PLOS ONE, Public Library of Science, vol. 13(10), pages 1-11, October.
    • Handle: RePEc:plo:pone00:0204562
    DOI: 10.1371/journal.pone.0204562
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    1. Gareth J. Hollands & Giacomo Bignardi & Marie Johnston & Michael P. Kelly & David Ogilvie & Mark Petticrew & Andrew Prestwich & Ian Shemilt & Stephen Sutton & Theresa M. Marteau, 2017. "The TIPPME intervention typology for changing environments to change behaviour," Nature Human Behaviour, Nature, vol. 1(8), pages 1-9, August.
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