Bridging psychological research exploring emotional complexity and research in the natural sciences on the measurement of biodiversity, we introduce-and demonstrate the benefits of-emodiversity: the variety and relative abundance of the emotions that humans experience. Two cross-sectional studies across more than 37,000 respondents demonstrate that emodiversity is an independent predictor of mental and physical health-such as decreased depression and doctor's visits- over and above mean levels of positive and negative emotion. These results remained robust after controlling for gender, age, and the 5 main dimensions of personality. Emodiversity is a practically important and previously unidentified metric for assessing the health of the human emotional ecosystem.
Quoidbach, J., Norton, M. I., Kotsou, I., Kogan, A., Mikolajczak, M., & Gruber, J. (2014). Emodiversity and the emotional ecosystem. Journal of Experimental Psychology: General, 143(6), 2057-2065. https://doi.org/10.1037/a0038025 (Original work published 2014)