I have a feedback poll on my website, and need to find some sourced data or article which states how frequently users generally give feedback when using online polls that look like this:
For example the wikipedia feedback poll is discussed here, but I could not find data which shows what percentage of users actually used it to give feedback (e.g. "on average x% of visitors to articles gave feedback via the online poll").
Stack overflow also has a generic feedback poll for users who do not have an account / are not logged in. Any statistics for how frequently this poll is used would also be a good answer. I remember Jeff Attwood wrote a blog post once briefly mentioning that it was hardly ever used, but no numbers were mentioned.
Any help would be greatly appreciated.