Ever wondered how well you really know English? Are you really a master or can you just generally communicate? You can test how well you really know this language with the Word or Not vocabulary test. If you have four minutes, you can help science out and see how well you know this tricky language.

This is a really simple yes or no test. The screen will show you a word and you just have to indicate whether you know it or not. That’s it! You don’t have to choose a correct definition or anything like that, it works on the honor system.

Don’t guess though because sprinkled throughout there are fake words. They’re designed to look like words but they are not. Saying yes to one of these drops your overall score drastically. You can take this test multiple times and even though it says it takes four minutes, I got through it in maybe half of that time. There is a short questionnaire to identify some general data about you but no need to sign up for anything. Give it a whirl on the website.