{"id":142,"date":"2016-05-03T07:00:51","date_gmt":"2016-05-03T12:00:51","guid":{"rendered":"http:\/\/juneux.com\/blog\/?p=142"},"modified":"2019-11-11T10:23:30","modified_gmt":"2019-11-11T16:23:30","slug":"are-5-usability-testers-really-enough","status":"publish","type":"post","link":"https:\/\/juneux.com\/blog\/2016\/05\/are-5-usability-testers-really-enough\/","title":{"rendered":"Are 5 Usability Testers Really Enough?"},"content":{"rendered":"\n<p class=\"has-medium-font-size\">After I&nbsp;read&nbsp;Jakob Nielsen&#8217;s findings in 2000 that usability professionals only need to test 5 users, I&#8217;ve often wondered\u2026 can that really be right?<\/p>\n\n\n\n<p>After looking at data from my own usability studies, I was amazed to find that yes, 5 testers is enough.<\/p>\n\n\n\n<!--more-->\n\n\n<p><em>Disclaimer: The following is based on my experiences. Your results may vary.<\/em><\/p>\n<p>I set out to see if Nielsen was right, so I dug out 10 random usability studies and analyzed them to see what conclusion I could draw, if any.<\/p>\n<h2><strong>My Analysis Says Yes<\/strong><\/h2>\n<p>While a mere 10 studies is no where near the volume of studies Nielsen used to conduct his analysis, I surprisingly concluded that, yes, <strong>5 participants does seem to be enough<\/strong>.<\/p>\n<p>Among the\u00a010 usability studies, the first 5 test participants discovered between 66% and 91% of <strong>all<\/strong> usability issues found in that study. And when I looked at the findings uncovered by the last set of testers (participant #6 or\u00a0higher), these participants only found 1 or 2 additional medium- or high-severity issues per study.<\/p>\n<p>Each study had 8-10 total participants.<\/p>\n<h2>My UX Testing Recommendations<\/h2>\n<p>Despite these results,\u00a0my preference is still to test with 8-10 participants\u2014this\u00a0gives me wiggle room in case one participant is a no-show or is unusable for whatever reason.<\/p>\n<p>Plus, I usually recommend the rapid\u00a0iterative testing process. In this testing approach,\u00a0the project team proposes (and builds) different solutions for\u00a0the major usability issues identified so far. Then on the following test day, the site or app is re-tested with the new solution(s).\u00a0By the third participant, it&#8217;s usually clear whether a proposed solution is working or not.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Related Articles<\/h2>\n\n\n<ul class=\"wp-block-latest-posts__list wp-block-latest-posts\"><li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/juneux.com\/blog\/2023\/05\/the-art-of-asking-the-right-questions-in-usability-studies\/\">The Art of Asking the Right Questions in Usability Studies<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/juneux.com\/blog\/2019\/03\/12-less-obvious-usability-issues-to-look-for\/\">12 Less Obvious Usability Issues to Look For<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/juneux.com\/blog\/2018\/08\/3-tips-for-more-successful-prototype-testing\/\">3\u00a0Tips for\u00a0More Successful Prototype Testing<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/juneux.com\/blog\/2016\/08\/your-super-important-role-as-a-usability-study-observer\/\">Your (Super Important) Role as a Usability Study Observer<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/juneux.com\/blog\/2016\/08\/what-to-usability-test-first\/\">What to Usability Test First<\/a><\/li>\n<\/ul>\n\n\n<div class=\"wp-block-button is-style-squared\"><a class=\"wp-block-button__link has-background has-bright-blue-background-color\" href=\"https:\/\/juneux.com\/blog\/contact\/\">contact june ux<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>After I&nbsp;read&nbsp;Jakob Nielsen&#8217;s findings in 2000 that usability professionals only need to test 5 users, I&#8217;ve often wondered\u2026 can that really be right? After looking at data from my own usability studies, I was amazed to find that yes, 5 testers is enough.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[19],"tags":[],"class_list":["post-142","post","type-post","status-publish","format-standard","hentry","category-usability"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Are 5 Usability Testers Really Enough? - June UX<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/juneux.com\/blog\/2016\/05\/are-5-usability-testers-really-enough\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Are 5 Usability Testers Really Enough? - June UX\" \/>\n<meta property=\"og:description\" content=\"After I&nbsp;read&nbsp;Jakob Nielsen&#8217;s findings in 2000 that usability professionals only need to test 5 users, I&#8217;ve often wondered\u2026 can that really be right? 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