When a shape lights up, press its matching key as fast as you can.
01
Choice reaction time measures how quickly you can identify a stimulus and choose the correct response, rather than just reacting to a single signal. Your brain has to do two things at once: recognise which stimulus appeared, and pick the matching response. That extra decision-making step is almost always slower than a simple reaction, often by 100ms or more.
02
In this test, one of four shapes appears and you press the matching key or tap the matching zone. You get five trials. Your score is the median of your correct answers, so a wrong press does not count toward your time.
Most adults average 300-350ms on a four-choice task like this. Under 320ms is a good score, and anything near 350ms is about average. Expect to be roughly 100ms slower than on our simple reaction test, because you have to pick the right response before you can make it. Our guide to simple vs choice reaction time explains where that gap comes from.
To read your result, start with the percentile. It compares your median with a research-based spread of adult scores, not with other visitors. Then count how many trials you got right. A fast time built on wrong keys means you were guessing, so slow down a little and aim for five correct answers. To see how this test stacks up against the others, read what counts as a good reaction time.
03
In 1952, psychologist William Edmund Hick showed that reaction time increases as a logarithmic function of the number of choices. Double the options and your reaction time goes up by a roughly fixed amount. This relationship, known as Hick's Law, has been tested many times since. A 2018 review by Proctor and Schneider in the Quarterly Journal of Experimental Psychology found that this fixed amount varies a lot: from almost nothing to several hundred milliseconds, depending on the task and how much practice people have had.
The relationship is logarithmic, not linear: going from 2 to 4 choices adds more time than going from 4 to 8. Practice also makes a big difference: in one study, the gap between 2-choice and 8-choice reaction times shrank from 500ms to 300ms after just five sessions.
04
Choice reaction time is closer to real-world decision making than a simple reaction test. Driving, sports, and gaming all require you to recognise a situation and pick the right response under time pressure. A goalkeeper facing a penalty kick, a driver deciding whether to brake or swerve, a gamer choosing which ability to use: all of these are choice reaction tasks.
Research in cognitive neuroscience shows that the brain handles more alternatives by activating larger networks in the prefrontal cortex. The more options you have, the more neural resources you need to pick the right one. Training and familiarity with the task can reduce this overhead significantly.
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