For the study, the researchers from University of Missouri and Purdue University sought to find out if "drunk personalities" are a thing or not. They specifically tested if "differences between sober and intoxicated personality expression can be observed reliably" by friends during some drunk game-playing. Two weeks prior to the experiment, the researchers had the 156 participants complete surveys describing their typical sober and drunk personalities. Next, the team gave half of the participants booze, then had their friends join them in the lab to play games meant to bring out different personality traits. The drinkers rated their own in-the-moment personality traits during the session while trained (and sober) raters assessed the same traits. While the drinkers noted personality differences in themselves while drunk, the sober onlookers didn't see any big differences between their sober and drunk personalities. Except for one thing: the drinks made those participants more extroverted. Obviously.
"We were surprised to find such a discrepancy between drinkers' perceptions of their own alcohol-induced personalities and how observers perceived them," said lead author Rachel Winograd, a psychological scientist at University of Missouri,
in a press release. "Participants reported experiencing differences in all factors of the
Five Factor Model of personality, but extraversion was the only factor robustly perceived to be different across participants in alcohol and sober conditions."
As for why you feel like an entirely different being when you've been a bit overserved? Probably just the
placebo effect. If you have it in your head that tequila makes you wild or wine makes you emotional, you'll make those expectations come true all on your own. Kind of impressive, actually. Cheers!
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