Can you specify how posts in Google Reader are marked as read?

Google Reader tends in my opinion to be a bit over-eager to mark posts as read - if you click on a post or scroll over the top of it it will be marked as read.

Is there a setting to control the conditions for a post being marked as read?

From web app Mark Pim

• OK, I can go to Google reader settings->Preferences and uncheck In expanded view, mark items as read when you scroll past them. That makes it slightly less eager.

  From Mark Pim

• If you use list view instead of expanded view, posts won't be marked as read until you click to open them.

  From joshjs