Test to determine Cog-Style

One thing I want to do for my site is to create some quick and dirty tools for people to get at least a sense of where they are in Socionics.

The one I'm most interested in, would be a short test to determine cognitive style.

Any good tips how this could work and or what a good starting point would be for questions?

Replies of "tests are shit" and "this will never work" will be noted and promptly forgotten ;-)