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Choose the colour of the ink, not the word, and see how much the clash slows you down.","2026-10-06","Stroop test",{"instruction":162,"note":165,"picture":166,"resultLabel":169},{"touch":163,"mouse":164},"A colour word appears in coloured ink. Tap the colour of the ink, not the word.","A colour word appears in coloured ink. Click or press the key of the ink's colour, not the word's.","8 words to practise, then 48 words. Each colour also has a name and a key.",{"kind":167,"name":168},"drawing","stroop-clash","Your Stroop effect",{"heading":171,"blocks":172},"How we measured this",[173,179],{"type":174,"text":175},"paragraph",[176],{"t":177,"v":178},"text","Your result is one difference. We take your middle time for the clashing words, those whose ink is not the colour they name, and subtract your middle time for the matching words, those written in the colour they name. Only right answers, given in time, count towards the two middle times. The difference is called the Stroop effect, or interference.",{"type":180,"items":181},"list",[182,190,193,196,199],[183,185,188],{"t":177,"v":184},"The first ",{"t":186,"v":187},"num","8",{"t":177,"v":189}," words are practice and never count.",[191],{"t":177,"v":192},"Half of the words that count match their ink and half clash, in an order that is different every run, with never more than three of one kind in a row.",[194],{"t":177,"v":195},"An answer that comes before you could have read the word, or after a few seconds, is left out of both middle times.",[197],{"t":177,"v":198},"A wrong answer is counted as wrong and leaves the middle times alone.",[200],{"t":177,"v":201},"If the page goes into the background during a word, that word does not count and it comes again at the end.",3,{"mouse":14,"touch":14,"keyboard":14},{"practice":205,"scored":206,"wrong":207,"anticipation":208,"lapse":209,"paused":210,"frameGap":211,"colours":212,"arena":225,"result":241,"flags":290},"Practice: {trials|int} words. Choose the colour of the ink.","Now it counts: {trials|int} words.","Not that colour.","Too quick to count.","{ms|ms} is too slow to count.","That word did not count: you looked away. Choose any colour to go on.","The screen stalled, so that word did not count. Choose any colour to go on.",{"red":213,"green":216,"blue":219,"yellow":222},{"word":214,"key":215},"Red","R",{"word":217,"key":218},"Green","G",{"word":220,"key":221},"Blue","B",{"word":223,"key":224},"Yellow","Y",{"label":226,"answers":227,"practiceOf":228,"wordOf":229,"opening":230,"right":231,"wrong":232,"quick":233,"slow":234,"away":235,"stalled":236,"pausedWhy":237,"demo":238,"keyOf":239,"colourNote":240},"Test area. A colour word appears. Choose the colour of its ink, not the word.","Choose the colour of the ink","Practice {n|int} of {of|int}","Word {n|int} of {of|int}","Now it counts","Right","Not that colour","Too quick to count","Too slow to count","That word did not count","The screen stalled: that word did not count","You looked away. Choose any colour to go on.","The ink is red, so you choose red.","key {key}","Every colour also has a name and a key.",{"label":169,"unit":242,"unitSpoken":243,"valueSpoken":244,"less":245,"more":246,"best":247,"bestSpoken":248,"contrast":249,"say":250,"yourBest":258,"details":259},"ms","milliseconds","{ms|int} milliseconds","Less slowed","More slowed","Your earlier best {ms|ms}","Your smallest earlier result was {ms|int} milliseconds.","Words in a clashing colour took you {incongruent|ms}, words in their own colour {congruent|ms}.",{"markers":251,"notCompared":256,"history":257},{"range":252,"above":253,"about":254,"below":255},"In a study of {people|int} students, most lost {low|int} to {high|ms} on the clashing words. You lost {you|ms}.","In a study of {people|int} students, the clashing words cost {value|ms} on average. They cost you {you|ms}: a bit more than that.","In a study of {people|int} students, the clashing words cost {value|ms} on average. They cost you {you|ms}: about the same.","In a study of {people|int} students, the clashing words cost {value|ms} on average. They cost you {you|ms}: less than that.","We did not compare this one: too few of your answers were right, or too few came in time.","We only show your own results for this one.","Your smallest result in this browser: {ms|ms}.",{"contrast":260,"matching":261,"clashing":262,"matchingValue":263,"counts":264,"accuracy":268,"difference":269,"compare":270,"historyWhy":271,"notComparedWhy":272,"legend":273,"device":276,"referenceWhy":287,"referenceLabel":288,"source":289},"Your two kinds of word","Words in their own colour","Words in a clashing colour","{ms|ms}",{"plural":265,"one":266,"other":267},"count","{count|int} right answer, {errors|int} wrong","{count|int} right answers, {errors|int} wrong","{share|pct} of the answers you gave in time were right. An answer under a fifth of a second or over three seconds is in neither count.","The difference between the two middle times is {ms|ms}. That is your Stroop effect.","What we compare you with","No published figure fits this run, so it is only set beside your own earlier results: the short orange ticks.","A result needs enough right answers to both kinds of word, and a high enough share of right answers, before it is set beside anything. This one is saved, and you can try again.",{"you":274,"history":275},"{ms|ms} is your result.","The short orange ticks are your earlier results in this browser.",{"heading":277,"used":278,"input":279,"timing":284,"timingEvent":285,"timingHandler":286},"Your device","You answered with",{"touch":280,"mouse":281,"keyboard":282,"pen":283},"A touch screen","A mouse","A keyboard","A pen","Timing","From the browser's own record of each answer.","From the moment the page read each answer, which can be a little later than the answer.","In a study of {people|int} students who answered with a key for each colour, the clashing words cost {ms|ms} on average. The study was longer and small, and the figure depends on the words, the screen and the way you answer, so it is a mark to look at, not a ranking. Your own earlier results are the short orange ticks.","Study average","Source",{"false-start":291,"anticipation":292,"lapse":293,"hidden":294,"frame-gap":295,"dropped-frames":296,"aborted":297,"unfinished":298,"too-few-trials":299,"latency-unknown":300,"untrusted":301,"key-repeat":302,"uniform":303,"implausible-rate":304,"assisted":305,"low-accuracy":306,"paste-refused":307,"skimmed":308,"low-comprehension":309,"straightlining":310,"too-fast":311,"too-many-skipped":312,"prorated":313,"not-enough-answers":314,"ceiling":315,"too-many-voids":316,"frame-limited":317,"frame-unknown":318,"lower-bound":319},"Pressed before the change: those tries were done again.","Some presses were too quick to be reactions: those tries were done again.","Some tries were too slow to count.","The page went into the background: that part was not counted.","The screen stalled for a moment: that try was done again.","The screen was slow to change on some tries: those times may be a little short.","Stopped before the end.","Not finished.","Too few right answers to one of the two kinds of word to give a result we compare.","The browser did not say how long its sound takes to play, so the times include an unknown delay.","Some presses did not come from your own touch, click or key and were ignored (a script or another program).","A held key repeated by itself: the repeats were ignored.","The presses came at evenly spaced intervals, like a machine's: the result is kept but not compared.","Faster than one finger can tap: runs with several fingers are kept but not compared.","Your keyboard corrected or predicted some words for you, so this run is not compared.","Too few answers were right to compare this run.","Pasted text was left out: only what you typed counts.","The text was on screen too briefly to have been read, so the reading speed is not compared.","Too few questions about the text were answered right, so the reading speed is not compared.","Many answers in a row were the same, also where statements point in opposite directions: the result is shown but not compared.","You answered very quickly, in under a second per statement on average, so this result is not compared with others.","Too many statements were left out to give a result.","Some statements were left out: their scales were completed from your other answers.","A scale has too few answers for a result.","You reached the end of the test, so your true result may be higher.","Too many tries were not counted (the page was in the background or the screen stalled).","The browser reports the mouse once per screen frame, so this is the screen's rate, not the mouse's.","The screen's frame rate is unknown, so it cannot be told whether this is the mouse's rate.","Many reports arrived together: the mouse reports at least this often.",1791315156232]