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A small study in the Netherlands found that people with a more curious personality tended to score higher on indicators of cognitive reserve, such as education and mentally stimulating leisure activities. However, neither curiosity nor these indicators of cognitive reserve were associated with performance on cognitive tests. The paper was published in Personality and Individual Differences.
As people age, many experience gradual cognitive decline. However, not everyone experiences this decline at the same pace or at the same age. While some individuals show marked cognitive decline relatively early, others maintain normal cognitive abilities into very advanced age. To help explain these differences, scientists developed the concept of cognitive reserve.
Cognitive reserve is the brain’s ability to maintain cognitive functioning despite aging, brain injury, or disease-related changes. It is thought to develop gradually across life through experiences that repeatedly engage the brain, such as education, intellectually demanding work, reading, learning new skills, and other mentally stimulating activities. In later life, greater cognitive reserve may help delay or reduce the cognitive effects of brain atrophy and other age-related changes, even though it does not necessarily prevent those physical changes from occurring.
One factor that may be of particular importance for building cognitive reserve is curiosity. Curious people are more likely to seek new information, explore unfamiliar experiences, and continue learning throughout adulthood. Activities encouraged by curiosity, such as reading books, learning languages, or exploring new places and ideas, may provide repeated cognitive stimulation over many years. Research has already linked the personality trait of openness to experience (a trait that also predisposes people to curious behaviors) to slower cognitive decline, suggesting that it may support resilience against it.
Study author Carolien Torenvliet and colleagues at Radboud University’s Donders Institute for Brain, Cognition and Behaviour explored the association between curiosity and various indicators of cognitive reserve. They also examined whether a curious personality (i.e., openness to experience and interest-based curiosity) was associated with cognitive abilities, and whether cognitive reserve might explain any such link.
Study participants were 106 adults recruited mainly from around Nijmegen in the Netherlands. They were between 40 and 85 years of age, with an average age of about 62, and 57% were women. People with current or past psychiatric or neurological disorders were excluded. Participants’ average estimated IQ was 118, well above the population average of 100.
Participants completed three questionnaires assessing curious personality: two measuring interest-based curiosity and one measuring openness to experience. They also completed the Dutch version of the Cognitive Reserve Index questionnaire, which estimates cognitive reserve from a person’s education, the complexity of their work, and their leisure activities. Finally, they completed three brief neuropsychological tests measuring memory, executive function, and processing speed.
Results showed that more curious individuals tended to score higher on indicators of cognitive reserve, specifically education and leisure activities, but not the complexity of their work. This association held after accounting for participants’ age. However, neither curiosity nor the cognitive reserve indicators were associated with performance on the cognitive tests.
“Although this study is limited by its cross-sectional design and relatively healthy sample, the results suggest that a curious personality may drive individual differences in cognitively stimulating experiences, but not cognitive abilities themselves,” the study authors concluded.
The study contributes to the scientific understanding of cognitive reserve. However, it should be noted that the design of the study does not allow any causal inferences to be drawn from the results. Curiosity may lead people to pursue more education and stimulating activities, but those experiences could also foster curiosity.
In addition, cognitive reserve was estimated from participants’ own reports of their past education, work, and activities rather than measured directly. Finally, participants were healthy and had higher-than-average estimated intelligence, and the sample was relatively small for a study of this type, which may have made it harder to detect links with cognitive performance.
The paper, “Curious people, resilient minds? The role of a curious personality in cognitive reserve and cognitive abilities,” was authored by Carolien Torenvliet, Dirk Bertens, Joukje M. Oosterman, and Iris Wiegand.