Rego, ArménioSousa, FilipaMarques, CarlaPina e Cunha, Miguel2026-01-122026-01-122012-04Arménio Rego, Filipa Sousa, Carla Marques & Miguel Pina e Cunha (2012) Optimism predicting employees' creativity: The mediating role of positive affect and the positivity ratio, European Journal of Work and Organizational Psychology, 21:2, 244-270, DOI: 10.1080/1359432X.2010.5506791359-432X1464-0643http://hdl.handle.net/10400.8/15285We examine how optimism predicts creativity both directly and through the mediating role of positive affect and the positivity ratio (the ratio between the frequency of positive and negative affective states). Five hundred and ninety five employees reported their positive and negative affect, as well as their optimism. Their creativity was reported by supervisors. The main findings are the following: (1) optimism predicts creativity both directly and through the mediating role of positive affect and the positivity ratio; (2) the relationship between the positivity ratio and creativity is curvilinear, in such a way that an "excessive" ratio is detrimental to creativity. The findings stress the relevance of optimism both for individuals and organizations, and suggest that examining positivity ratios is fruitful in the creativity domain, as it has been in other domains, and that negative affect should not be viewed simply as an obstacle when studying employees' creativity.engCreativityNegative affectOptimismPositive affectPositivity ratiojournal article10.1080/1359432x.2010.550679