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November 1, 2013

ROCK DOC: The science of detecting bluffs

Experienced poker players know the basic odds of drawing the card they need to build a better hand. They also are good at estimating if their hand is likely to be better than those of the other players around the table. In other words, probability and statistics are built into the game of poker.

Proficient poker players are also good at a more human-based skill. They spend time and effort trying to read the faces of their opponents. The goal is to deduce whether other players hold strong or weak hands based on the way their faces look as they play. That element of poker isn’t based on statistics so much as on practical psychology.

As the famous Kenny Rogers song about gambling says, “Son, I’ve made a life/Out of reading people’s faces/Knowing what the cards were/By the way they held their eyes.”

A good poker player develops a “poker face” that minimizes how much his or her visage betrays the cards in play. That fact has been known as long as people have been betting on card games. But now there’s evidence recently discussed at the ScienceNews website that having a good poker face isn’t enough. It seems card players need to develop “poker arms” as well. Here’s the scoop — one that you may find useful in your next card game.

Psychology researchers at Tufts University acquired video of high-ranking poker players playing cards and making bets at the World Series of Poker. The researchers then had 78 college students try to predict whether the players had good or strong hands based on the way they looked.

First the students were shown video of the players’ upper bodies and faces. The students had no luck predicting the players’ hands based on that aspect of the video record. That’s just a long way of saying that the high-ranking poker players really did have “poker faces.”

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