--- title: "How fast do you judge a homepage?" code: JZ-002 series: Perception published: 2026-10 updated: 2026-11-01 author: Joost van der Zwan canonical: https://softwarebehavior.com/notes/jz-002 skill: studio-jz-first-glance license: CC BY 4.0 --- # How fast do you judge a homepage? Field Note JZ-002 · Perception · First impressions **50 ms** enough to judge appeal ## The guess 5 seconds sounds fair: time to scan, read and decide. ## What the research found People judge how visually appealing a homepage is in 50 ms, shorter than a blink. Ratings after 50 ms matched ratings after 500 ms closely (r = 0.95), and pages kept their score when people saw them a second time. ## Why The gut votes first. Before anyone reads a word, layout and color have already set an impression, and later looks tend to confirm it. ## What to do - Get layout, color and visual hierarchy right before polishing copy. They are judged first. - Keep the first screen calm and clearly structured; one clear focal point beats many competing ones. - Test the first impression directly: show the screen for a fraction of a second and ask how appealing it feels, then compare versions. ## What not to do - Count on content to rescue a weak first look. People decide before they read a word. - Treat a good first impression as proof the page is easy to use. Appeal and usability are different questions. ## Limits - The study measured visual appeal, not usability or conversion. - People agreed with each other less at 50 ms than at 500 ms, so a 50 ms rating is a strong but rough signal. - Tested with homepages on desktop screens in a lab. ## Example - Before: A homepage with a dense hero: five headlines, three buttons, a carousel and a busy photo. - After: One headline, one supporting line, one primary action and plenty of space; tested as a quick flash against the old version. ## Sources - Lindgaard, G., Fernandes, G., Dudek, C. & Brown, J. (2006). Attention web designers: You have 50 milliseconds to make a good first impression! Behaviour & Information Technology, 25(2), 115–126. https://doi.org/10.1080/01449290500330448 ## Use with your AI This note is also a skill: `studio-jz-first-glance` (version 1.0.0). Download: https://softwarebehavior.com/skills/studio-jz-first-glance.zip · All skills: https://softwarebehavior.com/field-kit Software Behavior Field Notes by Joost van der Zwan · Studio JZ · CC BY 4.0 · softwarebehavior.com