Average Reaction Time: What's Normal?
Careful studies put simple visual reaction time at about 210 to 250 ms for adults. See how sound, choices, age and sleep change it, and how to test fairly.
Memory & Brain Training
Memory tests, reaction time and what the research says about brain games.
Guides
Digit Span Test: How Many Numbers Can You Remember?
A digit span test has you repeat digits in order, then in reverse. Adults average about 6 to 7 forward and about 5 backward. Here's how to test yourself.
Do Brain Games Improve Memory? What Research Shows
Brain games mostly make you better at the games themselves. What the ACTIVE trial, scientists, the FTC and the NIA say, and which habits have better evidence.
What Is the N-Back Test? How It Works and What It Shows
The n-back test asks you to spot when an item matches the one from n steps back. How 1-, 2-, 3- and dual n-back work, and what training studies found.