In 2005, the journal Obesity Research published a study that, had we but known it, told us everything we needed to know about our coming addiction to digital devices.
The paper, “Bottomless Bowls: Why Visual Cues of Portion Size May Influence Intake” was about soup. Researchers led by Brian Wansink of Cornell University invited volunteers to lunch. One groupate as much soup as they wanted from regular bowls. The other ate from bowls that were bolted to the table and refilled automatically from below. Deprived of the “stopping signal” of an empty bowl, this latter group ate 73 per cent more than the others – and had no idea that they had overeaten.
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