Investigating age-related differences in semantic control mechanisms involved in creative cognition.

Creative thinking is a complex, higher-order ability that draws on multiple cognitive systems. However, the contribution of specific semantic control processes to creativity remains unclear. The current study had two goals: First, we investigated how individual differences in semantic knowledge and control contribute to divergent and convergent styles of creative thinking, beyond the involvement of domain-general executive functions. Second, we explored whether there were age-related differences in semantic and executive abilities, and if these differences influenced the ability to think creatively. Specifically, we examined the role of the two components of semantic control: controlled retrieval and semantic selection. In our study, 63 younger adults and 64 older adults completed semantic, executive, and creative thinking measures. Younger adults demonstrated better executive functioning, while older adults exhibited superior semantic knowledge, controlled retrieval, and convergent thinking abilities. Crucially, there were no age differences across several divergent thinking metrics: automated originality scoring, human ratings, or uniqueness. Regression analyses indicated that semantic knowledge and updating executive ability influenced convergent thinking abilities across both age groups. In contrast, semantic control abilities were predictive of divergent thinking skills, but only in the younger group. Our results emphasize the key role of the semantic system in creative thought, and, critically, indicate that divergent and convergent thinking may rely on different aspects of semantic cognition. Moreover, the recruitment of these abilities varies across the lifespan, in line with increased knowledge reserves and declines in executive control seen in older adults.