Piaget proved wrong again!

Seems like the grandaddy of developmental psychology over-estimated the competance of everyone over eight years old. At about this age we learn about conservation of volume, in particular that a tall thin glass doesn’t necessarily have more in it than a short fat one.. except we often forget when drinks are involved.

Short glasses more likely to lead to over-indulgence
Shape of glass and amount of alcohol poured: Comparative study of effect of practice and concentration; BMJ Volume 331 pp 1512-4

People pour 20-30% more alcohol into short, wide glasses than into tall, narrow ones of the same volume, but they wrongly believe that tall glasses hold more, finds a study in this week’s BMJ.

Even professional bartenders pour more into short, wide “tumblers” than into “highball” glasses, suggesting that experience of pouring alcohol has little effect.

make mine a short!


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