The branches · 3 of 7
Memory and thinking
Remembering, learning, attention, and the quiet merge with always-on tools.
How we remember, learn, focus and reason, whether changed from inside (a drug, an implant) or from outside (an AI assistant that is always on and always consulted). The outside route is the soft version of merging with machines: no surgery, but a mind that increasingly works in partnership with one. This branch tracks both.
4 upgrades
furthest stage reached: in wide use- An always-on AI assistant is used daily by most adults in a country
The soft version of merging with machines: no surgery, no implant, only a habit. A person who asks an AI assistant questions through the day, drafts with it, remembers through it and checks their thinking against it is working in partnership with a machine, whatever they call it. Hundreds of millions of people now use such assistants every week. Whether most adults in any country use one every day is a question a survey can answer, and that is the bar this entry watches.
- A brain implant improves memory recall in a person
People with severe epilepsy sometimes have electrodes placed deep in the brain for a week or two while surgeons find the source of their seizures. Researchers have used that window to stimulate the memory parts of the brain while the person learns a list or a route, and found that the right stimulation at the right moment helps them remember more. It is a first human, done in patients who already had the electrodes, and no device exists that a person could have fitted for this.
- Electrical stimulation improves learning in healthy adults
A weak current passed through the scalp over the part of the brain that controls movement makes healthy volunteers learn a finger-tapping or tracking task faster and hold the gain longer. The effect was first reported in 2003 and has been repeated by some groups and not by others; a 2015 review of single-session studies found no reliable effect on thinking tasks. Headsets that do this were sold to athletes and gamers for several years. It is a first human with a real but contested effect and no regulator behind it.
- A drug raises a measured thinking ability in healthy adults
The pill that makes a healthy person smarter is one of the oldest promises on this tree, and the one with the least behind it. Stimulants make tired people more alert and quicker to react, and students take them for that. But alertness is not reasoning, and when healthy, rested adults are tested on memory or problem solving in properly controlled trials, the gains are small, inconsistent and rarely repeated. The entry is kept strict on purpose: it waits for a lasting gain in a thinking ability, not a shorter reaction time.