Cognitive Training Dramatically Reduces Dementia Risk

Cognitive training appears to play a significant role in reducing the risk of dementia. A comprehensive study has revealed that “speed training” can lower the chances of receiving a dementia diagnosis by 25%. This statistic comes from a groundbreaking randomised controlled trial conducted over 20 years, involving 2,832 participants aged 65 and older.

Cognitive Training and Dementia Risk

The study, led by researchers at Johns Hopkins University School of Medicine, investigated the potential benefits of cognitive training. Marilyn Albert, a prominent researcher involved, emphasized the study’s importance in confirming the positive impacts of brain training interventions. Previous skepticism had arisen in light of inconsistent evidence regarding the efficacy of brain training.

Study Design and Methodology

• Participants: 2,832 adults aged 65 and older.
• Structure: Random assignment to three intervention groups or a control group.
• Interventions:
  • Speed training using a computerized task called Double Decision.
  • Memory training strategies.
  • Reasoning training exercises.
• Sessions: Two 60-75 minute sessions per week for five weeks.
• Booster sessions: Some participants received four additional sessions at the end of the first and third years.

Results of the Long-Term Study

After 20 years, the researchers analyzed US Medicare claims data. They discovered that participants who engaged in speed training with booster sessions showed a 25% reduced risk of being diagnosed with Alzheimer’s or related dementia. Notably, no significant risk reduction was observed in other groups that included speed training without boosters.

Implications of Findings

These results prompted various responses from the scientific community. Some researchers, while impressed by the long-term follow-up, advised caution in interpreting the findings due to multiple outcomes being tracked during the study.

The Mechanics of Speed Training

The underlying reasons behind the effectiveness of speed training remain somewhat unclear. One hypothesis suggests that implicit learning, achieved without conscious effort, may lead to enduring changes in cognitive function. According to experts, other short efforts can similarly induce long-lasting brain alterations.

The Future of Cognitive Training

As the study concludes, the significance of cognitive training in maintaining brain health continues to unfold. While Albert cautioned against solely relying on speed training, she encouraged individuals to explore activities that stimulate implicit learning. Engaging in new hobbies or crafts could foster beneficial brain changes while providing enjoyment.

In summary, the research confirms a strong link between cognitive training and reduced dementia risk. Continued exploration in this area may hold promising implications for brain health as individuals age.