Reaction Time Test \u2014 BlackBeltWhiteHat<\/title>\r\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\r\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\r\n<link rel=\"stylesheet\" href=\"https:\/\/fonts.googleapis.com\/css2?family=Barlow+Condensed:wght@500;600;700&family=Barlow:wght@400;500;600;700&display=swap\">\r\n<style>\r\n :root{\r\n --bg:#f3f4f2; --surface:#ffffff; --surface-2:#ebedea; --line:#d8ddd4;\r\n --fg:#1a1d21; --muted:#5b6672; --accent:#cf3327; --accent-ink:#fff;\r\n --wait:#c9402f; --wait-ink:#fff; --go:#2a9d46; --go-ink:#fff;\r\n --ready:#2f6db0; --ready-ink:#fff; --early:#e49a1f;\r\n --radius:16px; --shadow:0 1px 2px rgba(20,25,30,.06),0 10px 30px rgba(20,25,30,.08);\r\n --display:\"Barlow Condensed\",Impact,\"Haettenschweiler\",sans-serif;\r\n --body:\"Barlow\",\"Helvetica Neue\",Arial,sans-serif;\r\n color-scheme:light;\r\n }\r\n @media (prefers-color-scheme:dark){:root:not([data-theme=\"light\"]){\r\n --bg:#111318; 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th{font-size:.68rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);font-weight:600}\r\n tr.hl td{background:var(--surface-2);font-weight:700}\r\n .dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:8px}\r\n footer{margin-top:22px;color:var(--muted);font-size:.8rem;line-height:1.55;text-align:center}\r\n @media (prefers-reduced-motion:reduce){*{transition:none!important}}\r\n<\/style>\r\n<\/head>\r\n<body>\r\n<div class=\"wrap\">\r\n <header>\r\n <div class=\"brand\"><b>BLACK<\/b>BELT<b>WHITE<\/b>HAT<\/div>\r\n <h1>Reaction Time Test<\/h1>\r\n <\/header>\r\n\r\n <div class=\"arena s-idle\" id=\"arena\" role=\"button\" tabindex=\"0\" aria-live=\"polite\" aria-label=\"Reaction test area. Press to start.\">\r\n <div>\r\n <div class=\"icon\" id=\"icon\">\u26a1<\/div>\r\n <p class=\"big\" id=\"big\">Reaction Time<\/p>\r\n <p class=\"small\" id=\"small\">When the red box turns green, click as fast as you can. Click anywhere to start.<\/p>\r\n <\/div>\r\n <\/div>\r\n\r\n <div class=\"progress\" id=\"progress\" hidden><\/div>\r\n\r\n <div class=\"panel\">\r\n <div class=\"stats\">\r\n <div class=\"stat\"><div class=\"k\">Last<\/div><div class=\"v\" id=\"stLast\">\u2014<\/div><\/div>\r\n <div class=\"stat\"><div class=\"k\">Average<\/div><div class=\"v\" id=\"stAvg\">\u2014<\/div><\/div>\r\n <div class=\"stat\"><div class=\"k\">Best<\/div><div class=\"v\" id=\"stBest\">\u2014<\/div><\/div>\r\n <\/div>\r\n <p class=\"ratingline\" id=\"rating\">Five rounds make an average. Ready when you are.<\/p>\r\n <div class=\"attempts\" id=\"attempts\"><\/div>\r\n <div class=\"btnrow\">\r\n <button class=\"act\" id=\"btnMain\" type=\"button\">Start<\/button>\r\n <button class=\"ghost\" id=\"btnReset\" type=\"button\" hidden>Reset<\/button>\r\n <\/div>\r\n <\/div>\r\n\r\n <div class=\"scale panel\">\r\n <h2>How you rate (average over 5)<\/h2>\r\n <table>\r\n <thead><tr><th>Rating<\/th><th class=\"r\">Reaction time<\/th><\/tr><\/thead>\r\n <tbody id=\"scaleBody\"><\/tbody>\r\n <\/table>\r\n <\/div>\r\n\r\n <footer>\r\n <p>Average human reaction time to a visual cue is around 200\u2013250 ms. Results vary with screen refresh rate, input lag, tiredness and how caffeinated you are \u2014 treat it as a bit of fun, not a lab measurement.<\/p>\r\n <\/footer>\r\n<\/div>\r\n\r\n<script>\r\n(function(){\r\n var ROUNDS=5;\r\n var SCALE=[\r\n {max:150,label:\"Superhuman\",col:\"#7c3aed\",blurb:\"Faster than almost anyone \u2014 or you got lucky.\"},\r\n {max:200,label:\"Lightning\",col:\"#2a9d46\",blurb:\"Elite. Gamer reflexes.\"},\r\n {max:250,label:\"Quick\",col:\"#3d9b46\",blurb:\"Above average \u2014 sharp reactions.\"},\r\n {max:300,label:\"Average\",col:\"#2f6db0\",blurb:\"Right around the typical human range.\"},\r\n {max:400,label:\"Steady\",col:\"#e49a1f\",blurb:\"A touch slower than average. Try again fresh.\"},\r\n {max:1e9,label:\"Sluggish\",col:\"#c9402f\",blurb:\"Tired, distracted, or the page lagged. Go again.\"}\r\n ];\r\n var $=function(id){return document.getElementById(id);};\r\n var arena=$(\"arena\"),icon=$(\"icon\"),big=$(\"big\"),small=$(\"small\");\r\n var stLast=$(\"stLast\"),stAvg=$(\"stAvg\"),stBest=$(\"stBest\"),rating=$(\"rating\"),attempts=$(\"attempts\");\r\n var progress=$(\"progress\"),btnMain=$(\"btnMain\"),btnReset=$(\"btnReset\");\r\n var state=\"idle\",times=[],goTime=0,timer=null;\r\n var best=null;\r\n try{var b=localStorage.getItem(\"bbwh_rt_best\");if(b)best=parseInt(b,10);}catch(e){}\r\n var sb=$(\"scaleBody\");\r\n SCALE.forEach(function(s,i){\r\n var range = i===0 ? \"under \"+s.max+\" ms\" : s.max>1e8 ? (SCALE[i-1].max)+\" ms +\" : (SCALE[i-1].max)+\"\u2013\"+s.max+\" ms\";\r\n var tr=document.createElement(\"tr\");tr.dataset.i=i;\r\n tr.innerHTML=\"<td><span class='dot' style='background:\"+s.col+\"'><\/span>\"+s.label+\"<\/td><td class='r'>\"+range+\"<\/td>\";\r\n sb.appendChild(tr);\r\n });\r\n function setClass(c){arena.className=\"arena \"+c;}\r\n function renderBest(){stBest.innerHTML = best!=null ? best+\" <small>ms<\/small>\" : \"\u2014\";}\r\n function ratingFor(ms){for(var i=0;i<SCALE.length;i++){if(ms<SCALE[i].max)return SCALE[i];}return SCALE[SCALE.length-1];}\r\n function renderProgress(){\r\n progress.hidden=false;progress.innerHTML=\"\";\r\n for(var i=0;i<ROUNDS;i++){var p=document.createElement(\"div\");p.className=\"pip\"+(i<times.length?\" done\":(i===times.length?\" current\":\"\"));progress.appendChild(p);}\r\n }\r\n function renderAttempts(){\r\n attempts.innerHTML=\"\";\r\n times.forEach(function(t,i){var c=document.createElement(\"span\");c.className=\"chip\";c.innerHTML=\"#\"+(i+1)+\" <b>\"+t+\"<\/b> ms\";attempts.appendChild(c);});\r\n }\r\n function reset(){\r\n clearTimeout(timer);state=\"idle\";times=[];\r\n setClass(\"s-idle\");icon.textContent=\"\u26a1\";big.textContent=\"Reaction Time\";\r\n small.textContent=\"When the red box turns green, click as fast as you can. Click anywhere to start.\";\r\n stLast.textContent=\"\u2014\";stAvg.textContent=\"\u2014\";\r\n rating.innerHTML=\"Five rounds make an average. Ready when you are.\";\r\n attempts.innerHTML=\"\";progress.hidden=true;btnMain.textContent=\"Start\";btnReset.hidden=true;\r\n document.querySelectorAll(\"#scaleBody tr\").forEach(function(r){r.classList.remove(\"hl\");});\r\n renderBest();\r\n }\r\n function startRound(){\r\n state=\"waiting\";setClass(\"s-wait\");icon.textContent=\"\u270b\";\r\n big.textContent=\"Wait for green\";small.textContent=\"Round \"+(times.length+1)+\" of \"+ROUNDS+\"\u2026\";\r\n btnMain.textContent=\"Waiting\u2026\";btnReset.hidden=false;renderProgress();\r\n var delay=1200+Math.random()*2800;\r\n timer=setTimeout(function(){state=\"go\";setClass(\"s-go\");icon.textContent=\"\ud83d\udc49\";big.textContent=\"CLICK!\";small.textContent=\"\";goTime=performance.now();},delay);\r\n }\r\n function recordGo(){\r\n var rt=Math.round(performance.now()-goTime);\r\n times.push(rt);state=\"result\";setClass(\"s-result\");icon.textContent=\"\u2713\";\r\n big.innerHTML=rt+\" <span style='font-size:.5em'>ms<\/span>\";\r\n stLast.innerHTML=rt+\" <small>ms<\/small>\";\r\n if(best==null||rt<best){best=rt;try{localStorage.setItem(\"bbwh_rt_best\",String(best));}catch(e){}}\r\n renderBest();renderAttempts();renderProgress();\r\n if(times.length>=ROUNDS){finish();}\r\n else{small.textContent=\"Click to continue (\"+times.length+\"\/\"+ROUNDS+\" done)\";btnMain.textContent=\"Next\";}\r\n }\r\n function finish(){\r\n state=\"done\";\r\n var sum=times.reduce(function(a,b){return a+b;},0),avg=Math.round(sum\/times.length);\r\n stAvg.innerHTML=avg+\" <small>ms<\/small>\";\r\n var r=ratingFor(avg);\r\n setClass(\"s-result\");icon.textContent=\"\ud83c\udfc1\";\r\n big.innerHTML=avg+\" <span style='font-size:.5em'>ms avg<\/span>\";\r\n small.innerHTML=\"<b>\"+r.label+\"<\/b> \u2014 \"+r.blurb;\r\n rating.innerHTML=\"Average <b>\"+avg+\" ms<\/b> over \"+ROUNDS+\" rounds \u2014 <b>\"+r.label+\"<\/b>.\";\r\n btnMain.textContent=\"Play again\";btnReset.hidden=false;\r\n document.querySelectorAll(\"#scaleBody tr\").forEach(function(row){row.classList.toggle(\"hl\",SCALE[+row.dataset.i].label===r.label);});\r\n }\r\n function tooSoon(){\r\n clearTimeout(timer);state=\"early\";setClass(\"s-early\");icon.textContent=\"\u26a0\";\r\n big.textContent=\"Too soon!\";small.textContent=\"You clicked before it turned green. 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Read Before Buying","author":"Dave","date":"December 31, 2013","format":false,"excerpt":"Creatine & creatinine Overview written by Andrew Griffiths Creatine provides 'energy' for explosive, powerful, short-duration movements & exercise creatinine is a byproduct of creatine breakdown creatinine tests are used to assess kidney function. A high level can be a bad sign, but it can also be the result of high\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/blackbeltwhitehat.com\/wp-content\/uploads\/2022\/02\/01-muscle-creatine-following-6-day-load-500.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":4590,"url":"https:\/\/blackbeltwhitehat.com\/en\/technique-directory\/wrestling\/double-leg-takedowns\/","url_meta":{"origin":18583,"position":4},"title":"Double Leg Takedowns","author":"Dave","date":"May 16, 2016","format":false,"excerpt":"First you need a good 'shot' and to master the penetration step. https:\/\/youtu.be\/C-M3eBSA6Yc?t=1m48s Drive off your back foot and bring it in front of you, basing on your foot. As you drive the back foot forwards step forwards with your front foot (the step is optional, especially from\u00a0close-in), and let\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/img.youtube.com\/vi\/C-M3eBSA6Yc\/0.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":4946,"url":"https:\/\/blackbeltwhitehat.com\/en\/supplement-reviews\/creatine-faqs\/","url_meta":{"origin":18583,"position":5},"title":"Creatine for BJJ & MMA – [2025] Science Explained (FAQ Format)","author":"Dave","date":"May 27, 2016","format":false,"excerpt":"One of the most, if not the most popular supplements on the planet - creatine is taken by millions of meatheads & athletes but understood scientifically by few. Is creatine a dangerous supplement or a youth-giving, brain enhancing wonder drug? 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{"id":18583,"date":"2026-11-09T12:23:00","date_gmt":"2026-11-09T12:23:00","guid":{"rendered":"https:\/\/blackbeltwhitehat.com\/?page_id=18583"},"modified":"2026-11-09T12:30:13","modified_gmt":"2026-11-09T12:30:13","slug":"reaction-time-test","status":"publish","type":"page","link":"https:\/\/blackbeltwhitehat.com\/en\/psychology\/reaction-time-test\/","title":{"rendered":"Reaction Time Test"},"content":{"rendered":"\r\n\r\n\r\n\r\n\r\nReaction Time Test \u2014 BlackBeltWhiteHat<\/title>\r\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\r\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\r\n<link rel=\"stylesheet\" href=\"https:\/\/fonts.googleapis.com\/css2?family=Barlow+Condensed:wght@500;600;700&family=Barlow:wght@400;500;600;700&display=swap\">\r\n<style>\r\n :root{\r\n --bg:#f3f4f2; --surface:#ffffff; --surface-2:#ebedea; --line:#d8ddd4;\r\n --fg:#1a1d21; --muted:#5b6672; --accent:#cf3327; --accent-ink:#fff;\r\n --wait:#c9402f; 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var(--fg);outline-offset:2px}\r\n .scale h2{font-family:var(--display);text-transform:uppercase;letter-spacing:.06em;font-size:.9rem;color:var(--muted);margin:0 0 10px;font-weight:600}\r\n table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}\r\n th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);font-size:.9rem}\r\n td.r,th.r{text-align:right}\r\n th{font-size:.68rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);font-weight:600}\r\n tr.hl td{background:var(--surface-2);font-weight:700}\r\n .dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:8px}\r\n footer{margin-top:22px;color:var(--muted);font-size:.8rem;line-height:1.55;text-align:center}\r\n @media (prefers-reduced-motion:reduce){*{transition:none!important}}\r\n<\/style>\r\n<\/head>\r\n<body>\r\n<div class=\"wrap\">\r\n <header>\r\n <div class=\"brand\"><b>BLACK<\/b>BELT<b>WHITE<\/b>HAT<\/div>\r\n <h1>Reaction Time Test<\/h1>\r\n <\/header>\r\n\r\n <div class=\"arena s-idle\" id=\"arena\" role=\"button\" tabindex=\"0\" aria-live=\"polite\" aria-label=\"Reaction test area. Press to start.\">\r\n <div>\r\n <div class=\"icon\" id=\"icon\">\u26a1<\/div>\r\n <p class=\"big\" id=\"big\">Reaction Time<\/p>\r\n <p class=\"small\" id=\"small\">When the red box turns green, click as fast as you can. Click anywhere to start.<\/p>\r\n <\/div>\r\n <\/div>\r\n\r\n <div class=\"progress\" id=\"progress\" hidden><\/div>\r\n\r\n <div class=\"panel\">\r\n <div class=\"stats\">\r\n <div class=\"stat\"><div class=\"k\">Last<\/div><div class=\"v\" id=\"stLast\">\u2014<\/div><\/div>\r\n <div class=\"stat\"><div class=\"k\">Average<\/div><div class=\"v\" id=\"stAvg\">\u2014<\/div><\/div>\r\n <div class=\"stat\"><div class=\"k\">Best<\/div><div class=\"v\" id=\"stBest\">\u2014<\/div><\/div>\r\n <\/div>\r\n <p class=\"ratingline\" id=\"rating\">Five rounds make an average. Ready when you are.<\/p>\r\n <div class=\"attempts\" id=\"attempts\"><\/div>\r\n <div class=\"btnrow\">\r\n <button class=\"act\" id=\"btnMain\" type=\"button\">Start<\/button>\r\n <button class=\"ghost\" id=\"btnReset\" type=\"button\" hidden>Reset<\/button>\r\n <\/div>\r\n <\/div>\r\n\r\n <div class=\"scale panel\">\r\n <h2>How you rate (average over 5)<\/h2>\r\n <table>\r\n <thead><tr><th>Rating<\/th><th class=\"r\">Reaction time<\/th><\/tr><\/thead>\r\n <tbody id=\"scaleBody\"><\/tbody>\r\n <\/table>\r\n <\/div>\r\n\r\n <footer>\r\n <p>Average human reaction time to a visual cue is around 200\u2013250 ms. Results vary with screen refresh rate, input lag, tiredness and how caffeinated you are \u2014 treat it as a bit of fun, not a lab measurement.<\/p>\r\n <\/footer>\r\n<\/div>\r\n\r\n<script>\r\n(function(){\r\n var ROUNDS=5;\r\n var SCALE=[\r\n {max:150,label:\"Superhuman\",col:\"#7c3aed\",blurb:\"Faster than almost anyone \u2014 or you got lucky.\"},\r\n {max:200,label:\"Lightning\",col:\"#2a9d46\",blurb:\"Elite. Gamer reflexes.\"},\r\n {max:250,label:\"Quick\",col:\"#3d9b46\",blurb:\"Above average \u2014 sharp reactions.\"},\r\n {max:300,label:\"Average\",col:\"#2f6db0\",blurb:\"Right around the typical human range.\"},\r\n {max:400,label:\"Steady\",col:\"#e49a1f\",blurb:\"A touch slower than average. Try again fresh.\"},\r\n {max:1e9,label:\"Sluggish\",col:\"#c9402f\",blurb:\"Tired, distracted, or the page lagged. Go again.\"}\r\n ];\r\n var $=function(id){return document.getElementById(id);};\r\n var arena=$(\"arena\"),icon=$(\"icon\"),big=$(\"big\"),small=$(\"small\");\r\n var stLast=$(\"stLast\"),stAvg=$(\"stAvg\"),stBest=$(\"stBest\"),rating=$(\"rating\"),attempts=$(\"attempts\");\r\n var progress=$(\"progress\"),btnMain=$(\"btnMain\"),btnReset=$(\"btnReset\");\r\n var state=\"idle\",times=[],goTime=0,timer=null;\r\n var best=null;\r\n try{var b=localStorage.getItem(\"bbwh_rt_best\");if(b)best=parseInt(b,10);}catch(e){}\r\n var sb=$(\"scaleBody\");\r\n SCALE.forEach(function(s,i){\r\n var range = i===0 ? \"under \"+s.max+\" ms\" : s.max>1e8 ? (SCALE[i-1].max)+\" ms +\" : (SCALE[i-1].max)+\"\u2013\"+s.max+\" ms\";\r\n var tr=document.createElement(\"tr\");tr.dataset.i=i;\r\n tr.innerHTML=\"<td><span class='dot' style='background:\"+s.col+\"'><\/span>\"+s.label+\"<\/td><td class='r'>\"+range+\"<\/td>\";\r\n sb.appendChild(tr);\r\n });\r\n function setClass(c){arena.className=\"arena \"+c;}\r\n function renderBest(){stBest.innerHTML = best!=null ? best+\" <small>ms<\/small>\" : \"\u2014\";}\r\n function ratingFor(ms){for(var i=0;i<SCALE.length;i++){if(ms<SCALE[i].max)return SCALE[i];}return SCALE[SCALE.length-1];}\r\n function renderProgress(){\r\n progress.hidden=false;progress.innerHTML=\"\";\r\n for(var i=0;i<ROUNDS;i++){var p=document.createElement(\"div\");p.className=\"pip\"+(i<times.length?\" done\":(i===times.length?\" current\":\"\"));progress.appendChild(p);}\r\n }\r\n function renderAttempts(){\r\n attempts.innerHTML=\"\";\r\n times.forEach(function(t,i){var c=document.createElement(\"span\");c.className=\"chip\";c.innerHTML=\"#\"+(i+1)+\" <b>\"+t+\"<\/b> ms\";attempts.appendChild(c);});\r\n }\r\n function reset(){\r\n clearTimeout(timer);state=\"idle\";times=[];\r\n setClass(\"s-idle\");icon.textContent=\"\u26a1\";big.textContent=\"Reaction Time\";\r\n small.textContent=\"When the red box turns green, click as fast as you can. Click anywhere to start.\";\r\n stLast.textContent=\"\u2014\";stAvg.textContent=\"\u2014\";\r\n rating.innerHTML=\"Five rounds make an average. Ready when you are.\";\r\n attempts.innerHTML=\"\";progress.hidden=true;btnMain.textContent=\"Start\";btnReset.hidden=true;\r\n document.querySelectorAll(\"#scaleBody tr\").forEach(function(r){r.classList.remove(\"hl\");});\r\n renderBest();\r\n }\r\n function startRound(){\r\n state=\"waiting\";setClass(\"s-wait\");icon.textContent=\"\u270b\";\r\n big.textContent=\"Wait for green\";small.textContent=\"Round \"+(times.length+1)+\" of \"+ROUNDS+\"\u2026\";\r\n btnMain.textContent=\"Waiting\u2026\";btnReset.hidden=false;renderProgress();\r\n var delay=1200+Math.random()*2800;\r\n timer=setTimeout(function(){state=\"go\";setClass(\"s-go\");icon.textContent=\"\ud83d\udc49\";big.textContent=\"CLICK!\";small.textContent=\"\";goTime=performance.now();},delay);\r\n }\r\n function recordGo(){\r\n var rt=Math.round(performance.now()-goTime);\r\n times.push(rt);state=\"result\";setClass(\"s-result\");icon.textContent=\"\u2713\";\r\n big.innerHTML=rt+\" <span style='font-size:.5em'>ms<\/span>\";\r\n stLast.innerHTML=rt+\" <small>ms<\/small>\";\r\n if(best==null||rt<best){best=rt;try{localStorage.setItem(\"bbwh_rt_best\",String(best));}catch(e){}}\r\n renderBest();renderAttempts();renderProgress();\r\n if(times.length>=ROUNDS){finish();}\r\n else{small.textContent=\"Click to continue (\"+times.length+\"\/\"+ROUNDS+\" done)\";btnMain.textContent=\"Next\";}\r\n }\r\n function finish(){\r\n state=\"done\";\r\n var sum=times.reduce(function(a,b){return a+b;},0),avg=Math.round(sum\/times.length);\r\n stAvg.innerHTML=avg+\" <small>ms<\/small>\";\r\n var r=ratingFor(avg);\r\n setClass(\"s-result\");icon.textContent=\"\ud83c\udfc1\";\r\n big.innerHTML=avg+\" <span style='font-size:.5em'>ms avg<\/span>\";\r\n small.innerHTML=\"<b>\"+r.label+\"<\/b> \u2014 \"+r.blurb;\r\n rating.innerHTML=\"Average <b>\"+avg+\" ms<\/b> over \"+ROUNDS+\" rounds \u2014 <b>\"+r.label+\"<\/b>.\";\r\n btnMain.textContent=\"Play again\";btnReset.hidden=false;\r\n document.querySelectorAll(\"#scaleBody tr\").forEach(function(row){row.classList.toggle(\"hl\",SCALE[+row.dataset.i].label===r.label);});\r\n }\r\n function tooSoon(){\r\n clearTimeout(timer);state=\"early\";setClass(\"s-early\");icon.textContent=\"\u26a0\";\r\n big.textContent=\"Too soon!\";small.textContent=\"You clicked before it turned green. 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