Yes, i read many online web pages for this but yet i don't get a surety. The searcher hovers activity with mouse pointer doesn't get green signal form the Google and this all conclusions are in "MAY Be" mode. So, I recommend not to waste your time for this but communicate with it because it is in MAY BE mode and when lighted with green signal I don't know. If signaled then it will cover different parts of search results, as well as advertisements.

Below is from Googles patent:

“A typical user’s behavior is to move the mouse pointer (or any other pointing indicator) over or near a target informational item, keep the mouse pointer there for a period of time while the user reads the item’s information (e.g., title and snippet), and then click through the underlying link or move to another item.
Sometimes, a user may review multiple informational items response to a search query, moving a pointer over or near each of the informational items that the user reviews. These various pointer activities can provide another way to evaluate the user’s feedback with respect to a particular information item.”

I have trouble with the concept too. I tend to have the mouse pointer all over the page (if nothing else, to get the pointer out of the way of the text I'm reading). It's often nowhere near material I'm interested in.

Yes this is true and I have read it somewhere that Google might check the mouse movements on search result pages to help rank web pages.

"mouse movements on search result pages to help rank web pages"
I can't believe it, How it possible?