Best approach of reliability

#1
Hi If im trying to measure the reliability of my test, which is aimed to measure defense mechanisms. and theres 2 types of defense mechanism, for example avoidance and emotional support, what is the best approach of reliability I should use? is my test considered unidimensional?
 

spunky

Doesn't actually exist
#2
To test for this you'd need to conduct some type of Factor Analysis or Structural Equation Modelling on the items of your test.