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This meta-analysis synthesizes 332 effect sizes of various methods to enhance creativity. We clustered all studies into twelve methods to identify the most effective creativity enhancement methods. We found that, on average, creativity can be enhanced, Hedges’ g = 0.53, 95%-CI 0.44, 0.61, with 70.09% of the participants in the enhancement conditions being more creative than the average person in the control conditions. Complex training courses, meditation and cultural exposure were most effective (gs = 0.66), while the use of cognitive manipulation drugs was least and also non-effective, g = 0.10. The type of training material was also important. For instance, figural methods were more effective in enhancing creativity, and enhancing converging thinking was more effective than enhancing divergent thinking. Study effect sizes varied considerably across all studies and for many subgroup analyses, suggesting that researchers can plausibly expect to find reversed effects occasionally. We found no evidence of publication bias. We discuss theoretical implications and suggest future directions for best practice in enhancing creativity.
Haase et al. (Mon,) studied this question.