I believe it's based on the current psychiatric system for diagnosing 'disorders', by wish i mean 'personality quirks' because by these tests, everyone has a fucking disorder.
I think these tests were a backlash on the study mention in <a href="http://www.critpsynet.freeuk.com/Overemphasis.htm">this article.</a>
Quote:
Spitzer was particularly concerned about the reliability of diagnosis (Spitzer and Fleiss, 1974). What had most perturbed him was a study by Rosenhan (1973), called On Being Sane in Insane Places. Rosenhan was a sociologist who was interested in the labelling effect of psychiatric diagnoses. What he did, in a classic study, was arrange for normal confederates of his to get admitted to a psychiatric hospital. He arranged for them to present themselves saying they were hearing a voice, saying a single word. There were three variations in the trial - either the pseudopatient said they were hearing the voice say "thud", "hollow" or "empty". This was the only symptom they had. No delusions or thought disorder or other symptoms of mental illness. Just a simple hallucination, and even then just one word, which is not particularly characteristic of mental illness.
What happened to these pseudopatients? All of them were admitted to psychiatric hospital. After admission they stopped feigning their symptom of hearing a voice. Some of the real patients detected that they were pseudopatients, because they saw them writing notes about their experience.
What diagnoses did they receive? All of them apart from one received a diagnosis of schizophrenia - the one who did not was diagnosed as manic-depressive. There is some qualification to this because although they had acquired a psychiatric diagnosis they were noted to be in remission, improved or asymptomatic.
The response of the psychiatric establishment to this study was disbelief. Rosenhan therefore informed the staff of a research and teaching hospital that at some time during the following three months, one or more pseudopatients would attempt to be admitted. No such attempt was actually made. Yet approximately 10% of real patients were suspected by two or more staff members to be pseudopatients.
from this, the psychiatric community freaked out and made these 'tests' which 'diagnosed' your illness, missing the point.
TL;DR Shrinks are retarded.