Public Lab Wiki documentation

Registration Test

Having trouble registering?

We have had problems with scripts, programs, and robots signing up onto the website. To prevent scripts from signing up, we have added a test to the signup page, which looks like this:


If you get an error that looks like this:

Spam detection -- It doesn't seem like you are a real person! If you disagree, read more here:

The error message you are seeing is generated because you did not fill out the test correctly, and the website thinks you are a robot. There are four pairs of sentences. One sentence in each pair is something a robot might say, the other sentence in each pair is something a human might say. In the screenshot above, we have selected the answers which represent what a human would say.

Please let us know at if you are still having problems, or if you have ideas about how to make this more clear for other users.