I was curious if anyone has known about research that has gone into testing MBTI validity? Not just the Forer Effect, but rather, has anyone gone into the research of showing how specific someone can go with a personality test and how that correlates with a person's agreement with the test?
For example, two people take the test. Both test as INFJs. One gets the NF profile, the other gets the full INFJ profile. What is the correlation between specificity of the test results and agreement?
I am not asking for opinions on the matter (just to save time). I am wondering if anyone knows if research like this has been done before, and if so, if they could point me towards it.