Quadzilla calls it SCASI. We call it poor user experience. Call it what you want, but your objective for SEO is the same as SEM... convert the customer.

I don’t think there’s a word for this yet, so I’ll invent the term SCASI (SERP Click After Site Inspection).

If a surfer Clicks SERP A from a list of SERPs and then (10 secs to 4 mins later) clicks any other SERP on that same list of search results it is a negative quality indicator. If the user found what they are looking for, they wouldn’t need to keep clicking on SERPs. If they continue to click, they’re initial find was not satisfying.

More from this quote: http://seoblackhat.com/2008/11/27/not-a ... t-a-scasi/

Interested in cheating a little bit? Of course you are....

Populate outbound links to Google's top-ranked sites for your search terms. This is wonderful user experience, and Google will reward you for it.... one way or the other. Feel free and use a nofollow, today it does no harm to what this effort is attempting to accomplish.

I'm happy to find mention of this. I have said for a long time that google watches things like user activity. You have to make sure visitors stay on your site by offering something interesting.