Abstract
Objective: To test the effects of technique and attitude in pulling Christmas crackers.
Design, setting and participants: A binomial trial conducted at a Christmas-in-July dinner party involving five anonymous dinner guests, including two of the authors.
Main outcome measure: Number of wins achieved by different strategies, with a win defined as securing the larger portion of the cracker.
Results: The previously ” guaranteed” strategy for victory, employing a downwards angle towards the puller, failed to differentiate itself from random chance (win rate, 6/15; probability of winning, 0.40; 95\% CI, 0.15–0.65). A novel passive–aggressive strategy, in which one individual just holds on without pulling, provided a significant advantage (win rate, 11/12; probability of winning, 0.92; 95\% CI, 0.76–1.00).
Conclusion: The passive–aggressive strategy of failing to pull has a high rate of success at winning Christmas crackers; however, excessive adoption of this approach will result in a complete failure, with no winners at all.
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