The coldness from the drink encourages rational judgement when you make decisions that involve money. "Encountering warmth or cold lights up the insula-a walnut-sized section of the brain. This part is engaged when we evaluate who we can trust in economic transactions," says John A. Bargh, a professor of psychology at Yale University. So, the next time you go shopping, grab a chilled drink first, you might save yourself a few hundred dollars!
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