Does anyone know of usability studies for "Edit in Place" design patterns? I'm trying to determine which might be the best option of what I've seen on the Web and haven't established that there's any standard practice yet.
Here's what I've seen:
1) Yellow highlight Flickr-style "Edit in Place": Clicking on field triggers edit. Drawback: Users may not be aware they can edit the field by clicking on it.
2) Pencil (or other) icon: Clicking on icon triggers edit
3) [Edit] link: Clicking on link triggers edit. Drawback: Dirties up the design of the page.
Any studies on which works best for users or any which you prefer?