Crossword better than computer games to boost memory Computer-based cognitive training can lead to improvements in memory, speed, and visuospatial skills in older adults, though has no effect on attention or executive functions such as impulse control, planning and problem solving. Associate Professor Michael Valenzuela at the Regenerative Neuroscience Group at the Brain and Mind Research Institute said: "Our results send a key message to the public. They show that brain training carried out in a centre can improve cognition in older adults, but commercial products promoted for solo training use at home just don't work. There are better ways to spend your time and money. The research team combined outcomes from 51 randomised clinical trials, including almost 5,000 participants, using a mathematical approach called meta-analysis. Prof Valenzuela said: "This is a very large number of clinical trials and the results were conclusive. We now understand how to prescribe brain training based on the highest standards of medical evidence. Part of this prescription is the frequency of training, also identified as an important factor. Doctor Amit Lampit said: "Training one to three times a week was effective, but training more than this neutralised any cognitive benefits. The brain's plastic mechanisms may saturate if training is too frequent. Like strenuous physical exercise, we recommend at least one rest day between training sessions. Prof Valenzuela added: "Modest gains are to be expected. This is not a magic bullet and we still don't know if this type of activity can prevent or delay dementia. Much more research is needed.