“In the early 1960s, the psychologist Sam Glucksberg demonstrated that the same effect could also inhibit creativity. He gave subjects a standard test of creativity known as the Duncker candle problem. The “high drive” group was told that the person solving the task in the shortest amount of time would receive $20. The “low drive” group, in contrast, was reassured that their speed didn’t matter. Here’s where the results get weird: The subjects with an incentive to think quickly took, on average, more than three minutes longer to find the answer. Experiments like this have led Ms. Beilock to conclude that people should be skeptical of evaluations based on a single high-stakes performance.”
