Cognitive functions in use test?

[Jacobman77]

I am caught in between types and I'm trying to discover my dominate function. Is there a way to test each function to see how natural it come to you? Can you think of mini challenges for each function because it's easier to lie on a test than it would be to become great at one of your shadow functions.

For example:

Se:Look at details in a room constantly for one minute.
Would this work? I assume that your weaker functions would become exhausted quickly so it might help discover your functions.