Do Brain-Training Games Actually Work? What the Evidence Shows

Brain-training products sit somewhere between a hobby and a health purchase, and they are usually advertised with a claim that sounds scientific: play these puzzles and your cognition will improve.

Whether that claim holds depends on a single technical question that researchers call transfer.

Close transfer versus far transfer

Close transfer means getting better at something similar to what you practised. If you play a memory game and then perform better on a different memory test that works much the same way, that is close transfer.

Far transfer means getting better at something genuinely different: a puzzle that supposedly improves your reasoning at work, your memory in conversation, or your risk of cognitive decline. That is the claim most advertising makes, and it is the claim the evidence has struggled to support.

A widely cited review published in Psychological Science in the Public Interest examined the studies that brain-training companies themselves cite. The authors found extensive evidence that people improve at the trained tasks, less evidence of improvement on closely related tasks, and little evidence that such training enhances performance on distantly related tasks or improves everyday cognition.

What the reviews found

The pattern has held across different review methods.

• An umbrella review of meta-analyses covering executive-function and working-memory training concluded that the available evidence could not support broad claims about real-world benefit.
• A meta-analysis of brain gaming in older adults with cognitive impairments pooled 14 randomised trials and found no superior effect of brain gaming over other interventions on global cognitive function.
• A comprehensive meta-analytic investigation of video-game training and cognitive ability reached a similarly cautious conclusion about broad cognitive enhancement.

Not every analysis agrees. A game-factors meta-analysis in PLOS One pooled 63 studies and reported a moderate, significant training effect with evidence of transfer to overall cognition. That is a real finding, and it is worth taking seriously. But it is also the kind of result that depends heavily on which studies are included and how transfer is defined.

Why the results disagree

Several methodological issues keep recurring.

Definition of transfer. If the outcome measure is nearly identical to the training task, improvement is almost guaranteed and tells you little. A review in Neuropsychologia argued that inconsistent results in this area largely reflect vague definitions of transfer, and that when training and test tasks are carefully separated, transferable benefits largely disappear.

Active control groups. Comparing a brain-training app to doing nothing is not a fair test. People in the training arm get attention, expectation of benefit, and a reason to engage. Trials that compare against an equally engaging activity tend to report smaller effects.

Publication and funding bias. Studies with positive results are more likely to be published, and industry-funded studies are more likely to report them.

What is worth doing instead

This is not an argument that cognitive activity is pointless. Reading, learning a language, playing an instrument, and working through complex problems all engage the brain, and all are associated with better cognitive functioning over time. The difference is that these are valued in their own right, and the evidence behind them is stronger and less dependent on a single product.

If you enjoy a brain-training app, that is a reasonable reason to use one. Treat any claim of measurable cognitive improvement as unproven until a fair, independent trial supports it.

This article is educational and is not medical advice.