A massive study of chess games found zero proof that women play worse against men, debunking an old theory.
March 19, 2026
Original Paper
No evidence for meaningful stereotype threat effects in tournament chess players
PsyArXiv · 576ch_v2
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The Takeaway
The concept that people perform worse when they fear confirming a negative stereotype is a cornerstone of social psychology. This massive dataset shows that female players perform exactly as their skill levels predict regardless of their opponent's gender, suggesting the 'stereotype threat' effect might not be as practically meaningful as once thought.
From the abstract
Past research has concluded that stereotype threat effects cause female chess players to underperform against male opponents. Here, we investigated whether this effect is large enough be practically meaningful, and whether it varies in line with the stereotype threat account. We analysed moves from 118,053 tournament chess games (N = 29,864 players), to test for a player × opponent gender interaction on performance, whether mixed-gender games were played more aggressively, and whether female pla