Heritability of self-reported artistic and practical/everyday creative self-beliefs in Brazilian twins

Creativity supports problem solving, artistic expression, and social interaction. Twin studies often find moderate additive genetic influence on self-reported creativity and little shared environmental effect, but estimates vary across measures and populations, and South American samples remain unexamined. We estimated the heritability of creative self-beliefs in artistic and practical/everyday domains using brief single-item indicators in 98 Brazilian twin pairs (79 monozygotic, 19 dizygotic) using ACE/AE models. Shared environmental effects were negligible, and AE models were more parsimonious. Heritability was modest for self-reported Artistic Creativity (h 2 = 0.22, 95% CI [0.01, 0.43]) and Practical/Everyday Creativity (h 2 = 0.21, 95% CI [0.00, 0.45]). A general latent factor based on both indicators accounted for 52-57% of their genetic variance and showed modest heritability (h 2 = 0.24, 95% CI [0.00, 0.58]). Curiosity models showed poor fit and were not interpreted. Although our main findings should not be interpreted as estimates of objective creative ability, divergent-thinking performance, or creative achievement, they provide initial twin-based estimates of individual differences in brief artistic and practical/everyday creative self-beliefs in Brazil and Latin America.