The wisdom of ignorant crowds: Predicting sport outcomes by mere recognition

• Main Authors: Stefan M. Herzog, Ralph Hertwig
• Format: Article
• Language: English
• Published: Society for Judgment and Decision Making 2011-02-01
• Series: Judgment and Decision Making
• Subjects: sports forecasting; rankings; betting odds; simple heuristics;name recognition; memory
• Online Access: http://journal.sjdm.org/11/rh18/rh18.pdf

that bets on the fact that people's recognition knowledge of names is a proxy for their competitiveness: In sports, it predicts that the better-known team or player wins a game. We present two studies on the predictive power of recognition in forecasting soccer games (World Cup 2006 and UEFA Euro 2008) and analyze previously published results. The performance of the collective recognition heuristic is compared to two benchmarks: predictions based on official rankings and aggregated betting odds. Across three soccer and two tennis tournaments, the predictions based on recognition performed similar to those based on rankings; when compared with betting odds, the heuristic fared reasonably well. Forecasts based on rankings---but not on betting odds---were improved by incorporating collective recognition information. We discuss the use of recognition for forecasting in sports and conclude that aggregating across individual ignorance spawns collective wisdom.