
© WestEnd61/Rex FeaturesGreater than the sum of its parts
If you're a headhunter looking for someone to work in a group, you might want to stop chasing down the most intelligent candidates. Group intelligence depends less on how smart individuals are and more on their social sensitivity, ability to take turns speaking, and the number of women in the group.
So says Anita Woolley from Carnegie Mellon University in Pittsburgh, Pennsylvania, and colleagues, having measured group intelligence and the influences that individuals have on it.
To measure group intelligence, Woolley placed 699 people into teams of two to five and asked them to carry out simple tasks including brainstorming, moral reasoning, puzzle-solving, typing and negotiating. The groups were evaluated on how well they did, and given an overall score for group intelligence.
Individual intelligence as measured by IQ tests relies on the premise that people who are good at one task are generally good at several, which suggests that an underlying "general intelligence" exists. Although somewhat controversial, such tests can be used to predict how well a person will do in more complex tests. Woolley's team found a similar general intelligence in groups, and it was also a successful predictor of how well that group would perform at subsequent, more complex tasks.