Health
New Study Finds Human Cognitive Abilities Peak Between Ages 55 and 60
Age may bring more than just experience — it could also bring sharper mental skills. A new study from the University of Western Australia suggests that humans reach their cognitive peak between the ages of 55 and 60, challenging the long-held belief that mental performance declines steadily after youth.
Published in the journal Intelligence, the research analyzed 16 key psychological characteristics, including reasoning, memory, and the “big five” personality traits — openness, conscientiousness, extraversion, agreeableness, and neuroticism. The findings revealed that overall mental functioning improves through midlife, peaking just before 60, before beginning to decline gradually after age 65.
“While several abilities decline with age, they’re balanced by growth in other important traits,” said Professor Gilles Gignac, co-author of the study. “Combined, these strengths support better judgment and more measured decision-making — qualities that are crucial at the top.”
The research team examined existing data sets to track how each trait developed over a lifetime, identifying what Gignac called a “striking pattern.” Not only did mental performance peak later than expected, but certain abilities continued to strengthen well into older age — with conscientiousness reaching its height around 65 and emotional stability peaking at 75.
The results challenge decades of assumptions about ageing and intelligence. While earlier studies suggested cognitive abilities peak in the 20s and decline steadily after middle age, mounting evidence shows the brain remains adaptable well into later life.
“It is hard to decide which aspects of cognition are most important to study,” said Mischa von Krause, a researcher at Heidelberg University who was not involved in the Australian study. “Their relative importance probably depends on the context and research question at hand.”
Von Krause’s own 2022 study, published in Nature Human Behaviour, found that mental speed — measured by how quickly people respond to stimuli — remains largely stable until around 60, with only minor declines afterward. “Until older adulthood, mean levels in the efficiency of information processing barely changed,” he said.
Even specialized skills show a similar trajectory. A 2020 study on professional chess players found their peak performance between ages 35 and 40, after which abilities gradually declined.
Together, these findings suggest that ageing is far from a one-way decline. Instead, certain cognitive and emotional capacities may strengthen with time, leading to better judgment, patience, and decision-making.
As Gignac concluded, “Age alone doesn’t determine overall cognitive functioning. Evaluations should focus on individuals’ actual abilities and traits rather than age-based assumptions.”
Health
Global Mental Health Cases Near 1.2 Billion as Anxiety and Depression Drive Sharp Worldwide Rise
A major global analysis has found that mental health conditions have surged to an estimated 1.2 billion people worldwide, driven largely by steep increases in anxiety and depression over the past three decades.
The findings, published in The Lancet as part of the Global Burden of Disease Study 2023, show that the number of people living with mental disorders has almost doubled since 1990, marking a 95% rise. Researchers say major depressive disorder and anxiety disorders have seen even sharper growth, increasing by 131% and 158% respectively, making them the most prevalent mental health conditions globally.
The report describes mental illnesses as widespread conditions that create long-term disability and significant human suffering. It also highlights broader consequences for economies and public services, including reduced productivity, lower workforce participation and increasing pressure on health and welfare systems.
Researchers estimate that in 2023 alone, around 620 million females and 552 million males were affected by mental health conditions. While the overall burden is rising across both sexes, the study points to notable differences in the types and prevalence of disorders.
Among women, depression and anxiety were the most commonly reported conditions, alongside higher rates of eating disorders such as anorexia nervosa and bulimia nervosa. The report links this disparity to a mix of biological, social and structural factors, including exposure to domestic violence, sexual abuse, gender inequality and reproductive health-related changes.
In contrast, neurodevelopmental and behavioural disorders, including attention deficit hyperactivity disorder (ADHD), conduct disorder and autism spectrum conditions, were more frequently diagnosed in men.
Teenagers aged 15 to 19 were identified as the group experiencing the highest mental health burden globally, raising concerns about early onset of conditions and insufficient preventive care for young people.
The study identifies several key risk factors associated with mental illness, including childhood sexual violence, bullying and intimate partner violence. These factors are strongly linked to conditions such as depression, schizophrenia, bipolar disorder and anxiety disorders. However, researchers note that such exposures have remained relatively stable over time and account for only a portion of the overall rise.
According to the authors, broader drivers are likely contributing to the increasing prevalence of mental disorders. These include genetic and biological influences, poverty, inequality, and the growing impact of global crises such as armed conflict, pandemics, natural disasters and climate-related stress.
While mental health conditions have long been a leading cause of disability worldwide, the report warns that the situation is worsening. At the same time, health systems have not expanded services at a pace matching demand.
The authors caution that the gap between rising need and limited access to care is becoming more pronounced, leaving millions without adequate treatment or support.
Health
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Health
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