Have you checked MM House Classification of prosthodontic patients?

This is House Classification as you can read it at:

http://cariouslegion.com/clinic-help/doku.php?id=classifications:house-psych

Class 1: Philosophical

Accepts dentist's judgement and instructions, best prognosis.

Class 2: Exacting

Methodical and demanding, asks a lot of questions, good prognosis.

Class 3: Hysterical

Emotionally unfit, never happy, worst prognosis.

Class 4: Indifferent

Doesn't care about dental treatment and gives up easily.

I think the essential question to be asking yourself is: What are you going to use these psychological profiles for? In a recent publication (Garner & al. J Prosthet Dent 2003;89:297-302) on the subject of House's Classification that previous responders have suggested, it is stated: "The value of this new classification (in which the dentist's reaction is included) is its effectiveness when applied in a clinical environment. If clinicians find the system instructive and helpful in understanding relationships with patients, then it is worthwhile even if it remains scientifically unproven".

With other words the importance of the revised House Classification is limited to being a help for the dentist to obtain self-knowledge regarding his relationship with his patient. It does not really help the dentist in dealing with difficult patients. Also, so far it has never been scientifically validated.

Even if it were validated, like so many of the psychological indices and scales that have been used in a dental context, the best that can be achieved is a trend (if indeed the index works) that is meaningful at a group level. For general practice, in the context of the individual patient, it would most probably be without clinical interest.

If you still intend to pursue this matter scientifically, in full awareness that it will have a possible importance only at a group level, you will be faced with a plethora of problems - like testing a possible index for reliability and validity, measuring errors etc. just to mention a few. If so, good luck!