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This Popular Diet Trick Has Been Debunked By Science

Trying this to improve portion control? Better re-think that. - by Lauren Williamson
  • 01 Aug 2018
This Popular Diet Trick Has Been Debunked By Science
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Let’s be real: portion control can be a serious struggle. Whether we’re hangry as hell or we just hankering for our favourite food, it can be all too easy to pile up our plates and before we know it a day’s worth of energy intake is done in a few minutes flat.

That’s why the old school method of serving up your meal on a smaller plate, to trick your brain into eating less, is so dang popular. It’s based on the Delboeuf illusion, which posits that if you take two identical circles and put a large ring around one and a small ring around the other, the circle inside the small ring appears larger.

RELATED: This Simple Strategy Can Help Stop You Overeating, Study Says

plate

Unfortunately, new research has found that the Delboeuf inspired diet hack isn’t all it’s cracked up to be.

In a new study, published in the journal Appetite, participants were split into two groups – one was instructed to eat in the hour before the test and the other was directed not to eat for at least three hours before hand. They then had to view images of pizzas served on large and small trays, and hubcaps in large and small tyres, and identify the larger options in both examples.

They found that out the unfed group were more likely to correctly identify the larger pizza, regardless of the size of its tray. However, both groups were equally inaccurate when asked to compare the size of black circles and hubcaps placed within different sized circles.

Researchers say that this shows how hunger stimulates stronger analytic processing that can overcome the trickery of the illusion.

"Plate size doesn't matter as much as we think it does,” Dr. Tzvi Ganel, the study’s co author, said. “Even if you're hungry and haven't eaten, or are trying to cut back on portions, a serving looks similar whether it fills a smaller plate or is surrounded by empty space on a larger one."

RELATED: This Is How Long It Should Take You To Finish A Meal

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Lauren Williamson
Lauren Williamson
Lauren Williamson is the Digital Content Manager for Women's Health and Men's Health. She's an experienced journalist, editor and social media fiend who's well versed in reporting on everything from food trends to fitness, health news to haircare. She has a double degree in Journalism and Political Science.

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