Cognitive Speed Training Linked to Lower Dementia Risk Over 20 Years

A decades-long study has revealed a potential link between cognitive training and a reduced risk of dementia, including Alzheimer’s disease. Adults age 65 and older who participated in a five to six-week programme focused on improving processing speed and who received follow-up “booster” sessions, showed a 25% reduction in dementia diagnoses up to 20 years later.

The ACTIVE Study: A Long-Term View

The findings stem from the Advanced Cognitive Training for Independent and Vital Elderly (ACTIVE) study, which began enrolling participants in 1998, and 1999. Researchers compared the effects of three types of cognitive training – memory, reasoning, and speed of processing – against a control group that received no training. The study involved 2,802 adults initially.

Speed Training: A Unique Approach

Participants in the speed-training groups completed up to 10 sessions over five to six weeks, with half receiving booster sessions 11 and 35 months after the initial training. This training focused on quickly identifying visual information on a computer screen and handling increasingly complex tasks efficiently. The programme was designed to adapt to each participant’s individual performance, providing a tailored level of challenge.

Did You Know? The ACTIVE trial is the largest US study to assess different types of cognitive training in adults.

Significant Results After Two Decades

A 20-year follow-up, analyzing Medicare data from 2,021 participants between 1999 and 2019, revealed a statistically significant difference in dementia diagnoses. Specifically, 40% of participants in the speed-training group with boosters – 105 out of 264 – were diagnosed with dementia, compared to 49% in the control group – 239 out of 491. This was the only intervention to demonstrate a meaningful long-term impact.

Understanding Dementia’s Impact

Dementia, characterized by declines in thinking that impair independent living, affects an estimated 42% of adults over age 55 at some point in their lives. It carries a substantial economic burden, costing the US more than $600 billion annually. Alzheimer’s disease accounts for the majority of dementia cases, representing 60% to 80%, while vascular dementia comprises 5% to 10%, with other forms including Lewy body and frontotemporal dementia.

Expert Insight: The long-term effects observed with speed training are remarkable, suggesting that even a relatively short, non-pharmacological intervention could have lasting benefits for cognitive health.

Looking Ahead

Researchers believe the effectiveness of speed training may be linked to its focus on implicit learning – the development of skills and habits without conscious awareness. This differs from the explicit learning emphasized in the memory and reasoning programs. Further research is needed to fully understand the underlying mechanisms and why the other training types did not yield the same 20-year results.

combining this type of cognitive training with other lifestyle interventions, such as maintaining cardiovascular health through diet and exercise, could further delay the onset of dementia, but this remains to be studied.

Frequently Asked Questions

What was the duration of the initial cognitive training?

Participants in the training groups received up to 10 sessions of 60 to 75 minutes of cognitive training over a period of five to six weeks.

What percentage of the original study participants were women?

Three-fourths of the participants in the follow-up study were women.

What types of dementia were considered in this study?

The study assessed links with dementia, including Alzheimer’s disease, vascular dementia, Lewy body dementia, frontotemporal dementia, and combinations of these.

Given these findings, how might individuals proactively support their cognitive health as they age?