Rapid filtering, choice reaction and high-load sorting — free, no signup
These games all load the same thing: how fast you can decide, as opposed to how fast you can move. Adding options to a decision adds time in a way that has been measured since the nineteenth century, and these drills sit squarely in that gap between perceiving something and producing a response.
A simple reaction test has one signal and one response, and it measures the motor floor. Everything here is slower than that by design, because there is something to work out first.
Lightning Choice is the clean choice-reaction measure. Hick's law, described in the early 1950s, says response time rises roughly with the logarithm of the number of alternatives — which is why a menu with fewer options feels faster.
Number Storm and Speed Sorting add a filtering step: not just choosing among known options, but finding which option applies. Both reward committing to one distinguishing feature rather than reading everything.
Piece Catcher and Escape Route add movement under load, where the score is decided by what you choose to abandon rather than by how fast you are.
Learn the mapping before you start. Any hesitation about which key does what is pure added time on every single trial.
Keep your hands positioned so no option is further away than another. Asymmetric hand position quietly biases every response.
Filter on one feature and commit to it for the whole round. Changing criteria mid-round is the most expensive mistake available in any of these games.
Do not guess to go faster. Every one of these penalises a wrong response by more than the time a correct one would have cost.
A finding from the early 1950s that decision time rises roughly with the logarithm of the number of alternatives. It is why adding options to a menu makes every choice slower, not just the extra ones.
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A reaction test has one signal and one response, so there is no decision. These add the decision, which is where almost all the extra time goes.
The response-selection step improves noticeably with practice on a specific task. The underlying relationship between options and time does not go away.