Extravert or Intravert

This is the primary attitude.

Intravert	Extravert
Consider their own viewpoint the final arbiter of reality Are energized by their inner world of thoughts	Define themselves in the light of externals Are energized by the external world of interacting with people

In case your test yields a result close to call, there are a few things to consider:

We are socialized to be Extravert, i.e. there is pressure from society to be part of it and thus interact with the outer world.
During transition phases we tend to look for sources of energy and draw it from wherever it comes, inner or outer world.
Try to free your mind and take the test a few weeks later.