She wrote a chapter about depression. I think you know what depression in your S looks like, etc. Michele did say that the S who is depressed will probably listen to a concerned relative or friend....better than their undepressed mate.
I have told LBH's that women don't heed very well when their LBH's try to get them to have their hormones checked. I think being depressed works much the same way. With the WAW's negative thought process, she believes her H is just trying to "fix" her but isn't really concerned about her problem.
As for what action he needs to take with a depressed W, it is basically the same steps as with any WAW. For example: Pull back and give her space if she appears that you are getting on her nerves or moody (biting your head off, etc.). Keep things upbeat as much as possible, but she may need to talk sometimes, so look her in the eyes so she knows you're truly listening. Depressed women usually need somebody to hear what they have to say.
I'm away from the house right now and don't have my book, so I'll have to look it up when I get home.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!