Computer brain games for treating cognitive impairment

The Bottom Line

  • Computerized cognitive training (CCT) is an enjoyable, easy and relatively inexpensive way to stay mentally fit.
  • CCT contributes to short-term cognitive improvements in people with mild cognitive impairment. Small improvements were also seen in people with dementia.
  • More research is needed to find out the longer term benefits of CCT, and if it helps prevent people with mild cognitive impairment from developing dementia.

“Use it or lose it.” That advice can apply to many situations but is often used to stress the importance of keeping our bodies and minds active in order to stay healthy, independent and mentally fit for as long as possible.

Research evidence supports this old adage (1) and there are plenty of good options for staying physically active… but how can we best exercise our brains? One option for a cognitive “work out” is computerized cognitive training (CCT): various types of computer programs designed to strengthen overall cognition and improve memory, attention span and learning. With many options now available online, CCT is showing promise in helping to prevent cognitive decline in healthy older adults (2;3).

That led researchers to investigate whether CCT could benefit those who have already experienced cognitive decline (4).They include people with mild cognitive impairment (MCI) who have noticeable problems with thinking, memory, language and decision making but are still able to function independently, and people with dementia whose cognitive impairments interfere with daily activities.

Study groups participated in supervised computerized cognitive skills training, video games or virtual reality activities for at least four hours in total, after which their cognitive abilities were measured and compared to control groups who didn’t take part in CCT or did different types of training.

What the research tells us

Cognitive “brain games” may be screen time well spent!

People with MCI experienced moderate improvement in their overall cognitive abilities after taking part in computerized cognitive training sessions, specifically in areas such as memory, attention, verbal and non-verbal learning, and psychosocial functioning (4). For people with dementia, the evidence was less encouraging but some minor improvements were noted.

Cognition tests were taken immediately after the completion of training, so the results don’t tell us much about the longer term impacts of CCT. More research is needed to address those and other questions, including whether CCT can help prevent the progression of mild cognitive impairment to full dementia.

Although these results are promising, computer “brain games” should not be considered a one-step solution to keep our brains healthy and sharp. Research evidence shows that people with cognitive impairment, and their caregivers, benefit most when support programs have multiple components, including physical exercise and social interaction (5), and most of us can benefit from less sedentary screen time! However, this research suggests that computer-based cognitive training can be considered one promising addition to treatment for people with cognitive impairment.

Featured Resources

  1. Web Resource Rating: Keeping your memory in shape

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Author Details


  1. Barnes, J. Exercise, cognitive function, and aging. N. Adv. Physiol. Educ. 2015; 39:55-62.
  2. Lampit A, Hallock H, Valenzuela M. Computerized cognitive training in cognitively healthy older adults: a systematic review and meta-analysis of effect modifiers. PLoS Med. 2014; 11:e1001756.
  3. Andrieu S, Coley N, Lovestone S et al. Prevention of sporadic Alzheimer’s disease: lessons learned from clinical trials and future directions. Lancet Neurol. 2015; 14:926-944.
  4. Hill NT, Mowszowski L, Naismith SL et al. Computerized cognitive training in older adults with mild cognitive impairment or dementia: a systematic review and meta-analysis. Am J Psychiatry. 2016; 174:4.
  5. Dawson A, Bowes A, Kelly F et al. Evidence of what works to support and sustain care at home for people with dementia: a literature review with a systematic approach. BMC Geriatrics. 2015; 15(59).

DISCLAIMER: These summaries are provided for informational purposes only. They are not a substitute for advice from your own health care professional. The summaries may be reproduced for not-for-profit educational purposes only. Any other uses must be approved by the McMaster Optimal Aging Portal (

Many of our Blog Posts were written before the COVID-19 pandemic and thus do not necessarily reflect the latest public health recommendations. While the content of new and old blogs identify activities that support optimal aging, it is important to defer to the most current public health recommendations. Some of the activities suggested within these blogs may need to be modified or avoided altogether to comply with changing public health recommendations. To view the latest updates from the Public Health Agency of Canada, please visit their website.