Help!

I'm looking for eye-tracking studies that specifically address how users process embedded assistance. For example:

• Where do users' eyes go when they're stumped?
• If inline messages or Help are provided, when do users focus on them?
• What is the optimal placement for instructional text relating to a page or field?

I have no shortage of my own opinions and anecdotal data on these things, but I would love to know if there are eye tracking studies that could provide that type of empirical data.

Also, I am NOT looking for eye-tracking of content-focused web sites or search results. Those I've seen. I'm interested in applications or forms and how users process inline Help.