Choice RT: Speed
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About this trainer
Choice RT: Speed is a reaction drill with more than one possible response. A signal appears - a colour, an arrow, a side of the screen - and you must pick the matching button as fast as you can without guessing. Unlike a simple reaction test where you just react to any signal, here you first have to decide which signal it is, and that decision is exactly what you are training.
What it develops
It sharpens choice reaction time: the speed of perceiving a stimulus, deciding what it means, and launching the correct motor response. In plain terms it trains the decide-then-act loop and your resistance to impulsive wrong taps, not raw reflex alone.
History
The choice reaction task goes back to the birth of experimental psychology. The Dutch physiologist F. C. Donders measured it in 1868 to time mental events, and in the 1950s the task became central to information-processing psychology, when researchers showed that reaction time grows in an orderly way as you add more response options.
Who created it — and when
There is no single inventor of the modern app version; it is a direct descendant of Donders' 1868 choice reaction experiment. The core principle - that reaction time rises logarithmically with the number of choices - is the Hick-Hyman law, named after W. E. Hick (1952) and Ray Hyman (1953), who established it independently.
How to train
Prioritise accuracy first, then speed - a fast wrong answer is worse than a slightly slower right one. Keep your fingers resting on the response keys, fix your eyes on the centre where signals appear, and react rather than predict. Warm up for a few rounds before chasing a personal best, and watch your error rate, not just the millisecond number.
How long to practise
Short and frequent beats long and rare. Three to five minutes a day, or a few blocks of 30 to 60 reactions, is plenty; reaction speed plateaus quickly, so daily consistency matters more than marathon sessions.
Evidence base
Evidence is strongest for exactly what you would expect - with practice you get measurably faster and more accurate on choice reaction tasks themselves, and the Hick-Hyman relationship between choices and speed is one of the most robust findings in psychology. Claims that this kind of training transfers to general intelligence or broad mental sharpness are weak: large reviews of brain training find little reliable far transfer. Narrower speed-of-processing training has been linked in some trials to everyday benefits like driving and lower dementia risk, but those results are contested and do not generalise to a plain choice reaction game, so treat the grand promises with caution.
Recommendations
Chase a low error rate first; let the milliseconds drop on their own once your accuracy is steady.
FAQ
How is this different from a simple reaction test?
A simple test measures how fast you react to a single known signal - you do not have to choose. Here several signals are possible and you must select the matching response, so it captures decision time on top of pure reflex.
Why do I get slower when there are more buttons?
That is the Hick-Hyman law in action: each extra option adds a roughly fixed increment of decision time, so reaction time climbs in an orderly, near-logarithmic way as choices increase. It is normal, not a sign you are doing badly.
Will this make me smarter or quicker in everyday life?
It will reliably make you better at this task and similar reaction tasks. Broad carryover to general intelligence or daily life is not well supported by the evidence, so enjoy it as targeted speed practice rather than a brain upgrade.
Variants
Common variants change what you must discriminate: colours, shapes, directional arrows, left-versus-right position, or two-handed key mapping. Harder modes add more choices, shrink the time window, or throw in no-go signals you must withhold a response to, blending choice reaction with inhibition.