All tests
55 tests, plus the data pages and articles that explain what the numbers mean. Nothing here needs an account, and nothing is behind a paywall.
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Reaction & Response Speed
Reaction Time TestClick as soon as the canvas lights up, then use the median of five trials as your score.Auditory Reaction Time TestPut on your headphones and press as soon as you hear the tone, taking care not to respond early.Choice Reaction Time TestMatch four squares to four keys, then press the correct key as quickly as you can.Go/No-Go TestPress when you see a circle, but hold back when a cross appears because resisting that response is the difficult part.Reaction Time Test for GamersTargets can appear anywhere, and the clock stops only when you hit one rather than when you first see it.Average Reaction Time by AgeSee how reaction time changes with age, what shapes the curve, and why the decline is smaller than people often assume.What 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.
Memory & Recall
N-Back TestWatch the moving square and choose match whenever it returns to the position it occupied n steps earlier.Digit Span TestWatch digits appear one at a time, then type them back as the list grows longer with each round.Corsi Block-Tapping TestWatch a sequence across nine blocks and tap it back in order without using words as a memory aid.Visual Memory TestStudy a flashing pattern and rebuild it as the grid grows after every correct answer.Sequence Memory TestRepeat the sequence as it grows by one step after every correct attempt.Aphantasia TestPicture four everyday scenes and rate how vivid each felt. A self-report placed in a range, with no better end.Photographic Memory TestStudy a picture for five seconds, then answer three questions about the details it contained.Chimp TestRemember the numbers scattered across the grid, then tap them in order after they disappear.Verbal Memory TestRead words one at a time and decide whether each has appeared before, with false alarms subtracted from your hits.Color Memory TestRemember several shades and find them on the colour chart as another shade is added after every correct round.What Is a Good Digit Span?Compare forward and backward digit-span percentiles, then learn what a high score can and cannot tell you.How Working Memory WorksLearn how verbal and visual working memory operate, why capacity is limited, and why test results can disagree.
Attention & Focus
Stroop TestName the ink colour while ignoring the written word, even when the two pieces of information conflict.Sustained Attention TestPress for every digit except 3 while the repetitive task makes it increasingly difficult to stay focused.Psychomotor Vigilance TaskWatch for a faint signal during three quiet minutes, with every missed response counted as a lapse.Trail Making TestJoin the dots in order, then repeat the task while alternating between numbers and letters.Selective Attention TestChoose the direction of the centre arrow and measure the delay caused when the arrows beside it point elsewhere.Attention to Detail TestCompare two columns of codes and find the eight mismatched rows without a clock rushing your work.Schulte TableFind the numbers 1 to 25 across five shuffled grids and see how your speed changes from the first table to the last.The Stroop Effect ExplainedExplore ninety years of evidence about the Stroop effect, including what this reliable finding does and does not show.
Motor Skill & Input Speed
Click Speed TestClick as quickly as you can, with the timer beginning on your first click so you can start when you are ready.Spacebar Speed TestTap the space bar as quickly as you can because holding it down does not add to your score.Typing Speed TestType one minute of real prose to calculate your net words per minute after errors are subtracted.Aim TrainerHit thirty targets one at a time, with every movement timed and no pause between targets.Double Click TestComplete ten double clicks as quickly as you can, then see the median time between the clicks in each pair.Tempo KeeperTap along with the beat, keep going after it stops, and see how far each tap falls from the expected time.Average Typing SpeedSee where 40 words per minute falls in the published range and learn how to interpret your own typing speed.
Processing Speed
Mental Age TestComplete two short blocks to get one speed index and see the nearest age band, although the bands overlap widely.Digit Symbol Substitution TestMatch nine digits to nine symbols for ninety seconds, with your score showing how many answers you completed correctly.Symbol Search TestCompare two symbols with a group of five, answer yes or no, and see how long your typical decision took.Number Comparison TestCompare number pairs from three to nine digits long, then see how many you answered correctly in one minute.Mental Math TestSolve sums one at a time and see how many correct answers you can type in one minute.Processing Speed by AgeProcessing speed peaks early, but differences between people of the same age often exceed the changes across decades.
Hearing & Audio
Perfect Pitch TestListen to a note without a reference tone and name it on the keyboard before the clock runs out.Relative Pitch TestListen to two notes from a different starting pitch each time, then identify the musical distance between them.Hearing Frequency TestCheck the highest frequency your audio setup can reproduce, since your speakers may reach their limit before your ears.Tone Deaf TestCompare two tones and choose the higher one as the gap between them closes toward your hearing threshold.Audio Memory TestListen to a melody without visual hints, tap it back on the pads, and find the longest sequence you can remember.Sound Localisation TestMeasure how you use the tiny timing difference created because your ears sit about twenty centimetres apart.How Rare Is Perfect Pitch?Published estimates use musicians or volunteers, so no study has measured the true rate across the general public.
Logic & Problem Solving
Common Sense TestAnswer everyday questions with one checkable solution, no clock or ranking, and a clear reason after every choice.Pattern Recognition TestFind the hidden rule across six tiles and choose the seventh as each new level adds another rule to follow.Critical Thinking TestRead two statements and decide whether the conclusion follows, even when it sounds obviously wrong.Abstract Reasoning TestFind the figure that breaks the shared rule across twenty sets while one clock runs through the whole test.Numerical Reasoning TestRead a table of figures and answer one question at a time, with accuracy counting more than calculation speed.Verbal Reasoning TestRead a passage, decide what it supports, and see how often you avoid conclusions that the text cannot settle.Matrix Reasoning TestComplete a nine-tile grid by following the rules that run across its rows and down its columns at the same time.Cognitive Reflection TestTry three short puzzles designed to produce a tempting first answer, then check whether a second look changes your mind.Mechanical Reasoning TestWork out which way a drive train will turn as each machine you clear adds another wheel.Decision Making TestReveal what you need from a covered board, choose among four options, and stop the clock by committing to an answer.Number Sequence TestStudy three numbers and predict the next one, knowing that every extra term you reveal will reduce your score.Do Brain Training Games Work?See why practice improves the trained game, why broader benefits fade, and what regulators say about stronger claims.
Spatial Reasoning
Mental Rotation TestCompare two block figures after one has turned and decide whether it shows the same shape or a mirror image.Paper Folding TestFollow a folded sheet as it is punched, then mark every hole that will appear when the sheet opens again.Embedded Figures TestFind a simple shape hidden inside a pattern of lines and see how long the search takes.Spatial Ability TestComplete three kinds of spatial question and see which one costs you the most marks.Block Counting TestCount each pile of cubes, including the hidden ones, and type the total before moving to the next stack.Mental Rotation Accuracy by AngleAccuracy stays high at every angle, while response time shows the clear cost of turning an object in your mind.