Fouls go left: Soccer referees may be biased based on play's direction of motion

Soccer referees may have an unconscious bias towards calling fouls based on a play's direction of motion, according to a new study. Researchers found that soccer experts made more foul calls when action moved right-to-left, or leftward, compared to left-to-right or rightward action, suggesting that two referees watching the same play from different vantage points may be inclined to make a different call.

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