Intelligence has been declared as a necessary, but not sufficient condition for creativity, which was subsequently translated into the so-called threshold hypothesis (after some point, intelligence is not related to creativity)

Weiss, Selina, Diana Steger, Ulrich Schroeders, and Oliver Wilhelm. 2020. “Creativity and Intelligence: An Investigation of the Threshold Hypothesis.” PsyArXiv. September 2. doi:10.31234/osf.io/89bv5

Abstract: Intelligence has been declared as a necessary, but not sufficient condition for creativity, which was subsequently translated into the so-called threshold hypothesis. This hypothesis predicts a change in the correlation between creativity and intelligence at around 1.33 standard deviations above population mean. Closer inspection of previous results—that report different thresholds or no threshold at all—suggests that a divergence is mostly due to the use of suboptimal data-analytical procedures. We apply and compare three methods that allow a continuous consideration of intelligence (e.g., local structural equation models that allows a latent variable analysis). Based on two multivariate studies (N1 = 456; N2 = 438) we examine the threshold of the creativity-intelligence relation with: a) scatterplots and heteroscedasticity analysis, b) segmented regression analysis, and c) local structural equation models. In sum, we found no evidence for the threshold hypothesis of creativity across different analytical approaches in both studies. Given the problematic history of the threshold hypothesis and its unequivocal rejection with appropriate multivariate methods we recommend to abandon the threshold once and for all.