You might look ridiculous pacing around the restaurant trying to figure out how much each of your friends owes, but new psychology research suggests you’ll get the last laugh.
Thanks to a mechanism in the human brain that likes to pair related, abstract concepts, scientists have found a so-called “congruency effect” in studying how we think. Similar to the infamous Tetris effect, in which extended gameplay can make other parts of your life seem to be nothing but L-shaped blocks and elusive straight pieces, the research shows the brain has a preference for addition and subtraction based on walking left or right.
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