A groundbreaking 20-year study has demonstrated that engaging in a specific computer-based cognitive speed training game for at least 23 hours can reduce the risk of dementia by a significant 25%. This research, involving nearly 3,000 participants aged 65 and older, provides compelling evidence that targeted brain training interventions can play a crucial role in combating neurodegenerative diseases.
Long-Term Study Reveals Promising Results
The findings, published this week in the Alzheimer's & Dementia: Translational Research and Clinical Interventions journal, stem from the Advanced Cognitive Training for Independent and Vital Elderly (ACTIVE) study, which first enrolled participants in 1998. Researchers meticulously tracked participants over two decades, monitoring their engagement with specific cognitive exercises and recording the exact hours spent on these activities.
Three Types of Cognitive Training Tested
Participants were divided into groups that received one of three types of cognitive training through brain games: memory exercises, reasoning tasks, and speed of processing challenges. All groups underwent up to 10 sessions of 60-75 minutes each over five to six weeks. Half of the participants additionally received booster sessions, accumulating a total of 23 hours of training over three years, while a control group received no training at all.
Speed Training Shows Most Significant Impact
During the 20-year follow-up, researchers discovered that individuals in the speed-training group who completed the booster sessions were 25% less likely to have been diagnosed with dementia compared to those in the control group. This intervention was the only one to demonstrate a meaningful difference, with memory and reasoning games showing no similar associations.
How the Speed Game Works
The computer-based speed game required participants to quickly identify visual information on a screen and manage increasingly complex tasks within shorter time frames. Crucially, the game adapted its difficulty level for each individual, presenting faster challenges to quicker participants and slower levels to those who struggled, ensuring personalised cognitive stimulation.
Expert Insights on the Findings
Marilyn Albert, Ph.D., the corresponding study author and director of the Alzheimer's Disease Research Center at Johns Hopkins Medicine, emphasised the significance of these results. "Seeing that boosted speed training was linked to lower dementia risk two decades later is remarkable because it suggests that a fairly modest nonpharmacological intervention can have long-term effects," she stated.
Albert further highlighted the broader implications, noting that "even small delays in the onset of dementia may have a large impact on public health and help reduce rising health care costs." She acknowledged that additional studies are necessary to understand the underlying mechanisms behind these results and to explain why reasoning and memory games did not yield similar benefits.
Previous Research and Future Directions
The ACTIVE study had previously released results after a 10-year follow-up, which indicated that participants who underwent speed training experienced a 29% lower incidence of dementia compared to the control group, with each booster session further reducing risk. This latest 20-year data reinforces the enduring protective effects of such cognitive interventions.
With approximately 982,000 people in the UK currently living with dementia, these findings offer a promising, accessible strategy for risk reduction. The study underscores the potential of adaptive brain training games as a valuable tool in public health initiatives aimed at delaying dementia onset and mitigating its societal burden.
