Brain training is a billion-dollar industry. Apps promise to boost IQ, prevent cognitive decline, and sharpen memory. The research is more complicated — and more interesting — than the marketing suggests.
A landmark open letter signed by over 70 cognitive scientists in 2014 summarised the consensus: brain training games improve performance on the specific tasks you train. Whether those improvements transfer to real-world cognitive abilities is much less clear.
In plain terms: if you practice a memory grid game, you'll get better at memory grid games. Whether that makes you better at remembering where you left your keys is a different — and largely unanswered — question.
Improving performance on trained tasks • Reaction time in specific contexts • Working memory capacity (with n-back training) • Processing speed in older adults with consistent practice
Transfer to untrained cognitive tasks • General intelligence improvement • Long-term protection against dementia • Academic performance gains from commercial brain apps
The Memory Grid challenges you to remember and recall patterns. Try it and see how long your streak lasts.
Play Memory Grid →The most consistent finding is "near transfer": skills improve most on tasks that are closely related to what you practiced. A working memory game improves working memory performance. A reaction time test improves reaction times. Action video games improve visual attention broadly.
The further a new task is from what you trained, the less transfer you'll see. This isn't unique to brain training — it's true of any skill learning.
The activities with the most consistent evidence for broader cognitive benefit aren't the ones being sold in apps:
Yes — if you enjoy them. Games that challenge attention, memory and processing speed are genuinely good for those specific abilities. They're also fun, which makes them sustainable. Just don't expect a 10-minute daily game to replace the benefits of sleeping well and exercising.