Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) is a type of test used to determine whether or not a user is human or a computer. They are used to prevent automated software from completing a form or accessing a system.
GoS does not use CAPTCHAs due to:
- Usability - CAPTCHAs are designed to be hard to read and understand, this makes the service very difficult to use.
- Accessibility - The service presents a major problem to users who are blind, have low vision or have a learning disability. It makes the service not available.
- Conversion Rate - CAPTCHAs drives visitors aways from websites, far less users will answer a form if there is a CAPTCHA. They cause far more problems than they solve.