https://qz.com/1538407/learning-faster-might-be-possible-with-this-wearable-headset/
Brain hacking isn’t exactly new—we used to just call it “practice.”
If you wanted to get good at something, anything, you just did it and kept doing it until you basically rewired your mind to accommodate new information and skills. It required no drugs or devices, just determination and effort, since it’s the exertion and repetition that create structural changes in the brain.
Now, some technologists and neuroscientists are creating devices that will hack your brain more rapidly, or so they claim. For example, Daniel Chao, the founder of Halo Neuroscience, invented a headset that electrically stimulates your brain while you practice a motor skill. There are other such commercial devices out there, some aimed at amping up intellectual learning, like the
Brain Stimulator, a set of headbands and electrodes for self-administering transcranial direct current stimulation (tDCS), and the Caputron Activadose TDCS starter kit, which contains cables, electrodes, straps, batteries, sponges, and a current stimulator.
In all, more than a dozen tDCS devices are sold in the US to consumers to improve concentration or amp up learning. But none have been tested by the Food and Drug Administration because these are not technically considered medical devices, and so all anyone has to go on is manufacturer claims and anecdotal evidence.