This is correct, mouse movement is one factor for Google's one-click Captcha: https://www.wired.com/2014/12/google-one-click-recaptcha/ https://www.wired.com/2

This is correct, mouse movement is one factor for Google's one-click Captcha: https://www.wired.com/2014/12/google-one-click-recaptcha/ https://www.wired.com/2014/12/google-one-click-recaptcha/ > IP addresses and cookies provide evidence that the user is the same friendly human Google remembers from elsewhere on the Web. And Shet says even the tiny movements a user’s mouse makes as it hovers and approaches a checkbox can help reveal an automated bot.