Brain Function Peaks Much Later in Life Than Previously Thought, Study Finds

Contrary to popular belief, cognitive and emotional abilities don’t necessarily decline with age, and may in fact continue to develop well into middle and late adulthood, according to new research published today.

A study published in the journal Intelligence, led by Gilles E. Gignac, Associate Professor of Psychology at the University of Western Australia, examined a range of psychological traits influencing real-world performance. The research revealed that conscientiousness tends to peak around age 65, while emotional stability may not reach its maximum until approximately 75, with overall psychological functioning cresting between ages 55 and 60. Notably, moral reasoning and resistance to cognitive biases continue to strengthen into the seventies and eighties.

“These improvements may explain why demanding leadership positions in business, politics, and other fields are frequently held by individuals in their fifties and early sixties,” noted Gignac. While processing speed may decrease with age, gains in judgment and decision-making can compensate. This challenges long-held assumptions about age and productivity, potentially impacting workplace dynamics and retirement policies. Despite these findings, age discrimination remains a significant issue; a recent survey by Resume Now found nearly 90% of employees over 40 have experienced ageism in the workplace, a violation of the Age Discrimination in Employment Act of 1967.

The study highlights examples of significant achievements occurring later in life – Charles Darwin published On the Origin of Species at 50, and Beethoven premiered his Ninth Symphony at 53 while deaf – and emphasizes that cognitive ability varies greatly between individuals. Experts recommend lifestyle factors like a healthy diet, regular exercise, sufficient sleep, and continuous learning to support long-term brain health, as detailed by the National Institute on Aging.

Gignac encourages age-inclusive hiring practices and emphasizes evaluating individuals based on performance rather than age, stating that further research will focus on identifying specific interventions to maximize cognitive potential across the lifespan.