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!

About caspar

Caspar is just one monkey among billions. Battering his keyboard without expectations even of peanuts, let alone of aping the Immortal Bard. By day he is an infantologist at Birkbeck Babylab, by night he runs BabyLaughter.net
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