CognitiveDrill

Think Hard. Train Smart. Improve Daily.

Reaction time, memory, attention and typing speed. Every test takes under two minutes, gives you one honest number, and shows you exactly where that number sits.

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Median reaction timeReaction Time TestClick as soon as the canvas lights up, then use the median of five trials as your score.Digit spanDigit Span TestWatch digits appear one at a time, then type them back as the list grows longer with each round.Stroop interferenceStroop TestName the ink colour while ignoring the written word, even when the two pieces of information conflict.Net typing speedTyping Speed TestType one minute of real prose to calculate your net words per minute after errors are subtracted.Sequence lengthSequence Memory TestRepeat the sequence as it grows by one step after every correct attempt.

By domain

5 testsReaction Time TestsExplore five ways to measure the time between noticing a signal and responding with your finger.10 testsMemory TestsTry tasks that find the limit of your short-term memory, along with two tests that measure memory in a different way.7 testsAttention TestsTry four laboratory tasks that measure what happens when your attention slips or meets a distraction.6 testsInput Speed TestsMeasure how quickly and accurately your hands can handle clicks, words, keys and moving targets.5 testsProcessing Speed TestsCompare four ways to measure how quickly you can understand simple information and respond to it.5 testsSpatial Reasoning TestsTry five visual tasks that use pictures instead of words, with each one measuring a different spatial skill.11 testsLogic Tests and Problem SolvingWork through eleven reasoning tests, each designed to measure a different part of how you solve problems.6 testsHearing TestsTry four listening tasks, each with one clear score and an honest explanation of what a browser cannot measure.

What is different here

Measurement

We start the clock when the stimulus reaches your screen, not when the code decides to show it. Responses under 100 ms are thrown out as guesses. Your score is your middle trial, not your luckiest one. The methodology page says exactly what we can and cannot measure in a browser.

Comparison

Every score is placed against a distribution, and we name its source. We have published no figures of our own yet. A norm needs at least 1,000 results before it means anything, and we will not print a sample size we do not have.

Claims

Practice makes you better at the test you practise. Whether that carries over to anything else is unsettled, and the evidence mostly says no. Every score stays specific to the task you took.

Numbers and reading

DataAverage Reaction Time by AgeSee how reaction time changes with age, what shapes the curve, and why the decline is smaller than people often assume.DataWhat Is a Good Digit Span?Compare forward and backward digit-span percentiles, then learn what a high score can and cannot tell you.DataAverage Typing SpeedSee where 40 words per minute falls in the published range and learn how to interpret your own typing speed.DataProcessing Speed by AgeProcessing speed peaks early, but differences between people of the same age often exceed the changes across decades.DataHow Rare Is Perfect Pitch?Published estimates use musicians or volunteers, so no study has measured the true rate across the general public.DataMental Rotation Accuracy by AngleAccuracy stays high at every angle, while response time shows the clear cost of turning an object in your mind.ArticleWhat Is a Good Reaction Time?Learn what counts as a good reaction time, how hardware changes the result, and why the popular benchmark is misleading.ArticleHow Working Memory WorksLearn how verbal and visual working memory operate, why capacity is limited, and why test results can disagree.ArticleThe Stroop Effect ExplainedExplore ninety years of evidence about the Stroop effect, including what this reliable finding does and does not show.ArticleDo Brain Training Games Work?See why practice improves the trained game, why broader benefits fade, and what regulators say about stronger claims.