Does a Search engine rate the alt attribute on image tags?

Question

Do search engines rate also the alt atribute in image tags? In my opinion the alt attribute was for blind peoples.

Answer 1

A quick google search led me to this blog post: http://googlewebmastercentral.blogspot.com/2007/12/using-alt-attributes-smartly.html

It seems at least google is checking the alt attribute but every search engine has it's own methods so [your favourite search engine] might not use it.