Click on the arrow at the top right of your Facebook page and click the down arrow, then choose privacy settings, and then Edit Settings next to Apps and Websites and then Edit Settings next to How People Bring Your info into Apps they Use.
By default almost all of these boxes are checked off. To me this means that if a friend of mine uses some spammy quiz app the app can have access to all of my information (provided I haven't unchecked the boxes or turned off all access to apps).
In case you don't want to go there, here is how it is worded:
People on Facebook who can see your info can bring it with them when they use apps. This makes their experience better and more social. Use the settings below to control the categories of information that people can bring with them when they use apps, games and websites.
How do you interpret this?