A character trait that increases the brain's "margin of resilience" has been identified

Curiosity has been found to be linked to what is known as cognitive reserve — the brain's "margin of resilience" that helps maintain mental clarity longer in old age. Curious people accumulate more experience, which builds this reserve. The study was published in the journal Personality and Individual Differences.

Scientists from the Donders Institute in the Netherlands examined 106 people aged 40 to 85. They assessed levels of curiosity and openness to new experiences, as well as indicators of cognitive reserve — education level and variety of leisure activities.

It turned out that more curious people also had higher cognitive reserve scores, and this association held even after adjusting for age. Simply put, curiosity drives people to learn, master new things, and lead a more enriched life, and this is precisely what is believed to strengthen the brain and delay age-related decline in memory and thinking.

However, the result comes with an important caveat: higher reserve did not translate into better performance on cognitive tests. In other words, curiosity is associated more with the accumulation of "protective" experience than with direct improvement of mental abilities in the here and now. Moreover, the study was small, and its participants were on average quite intelligent (mean IQ of 118). Nevertheless, the work supports a simple idea: maintaining curiosity and interest in the world is beneficial for the brain at any age — it is a natural way to keep it in shape.

Cognitive reserve is a concept that explains why, given similar changes in the brain, some people maintain mental clarity while others do not: this "margin of resilience" is built up through education, complex work, social interaction, and diverse interests. Curiosity, in this sense, is not merely a personality trait but a driving force that pushes a person toward learning and new experiences throughout life.