Clinical counseling begins which a battery of empirical tests comprised of 3–4 projective instruments and an equal number of subjective tests to complete an full psychological evaluation. This set of assessment tools is the backbone of a clinical study from which one is able to ascertain; diagnosis for treatment and referral.
Psychologists alone are the only mental health professionals who do psychological evaluations which ought to be the hinge pin of psychotherapy. Within a battery one is able to gain as close a proximity to a formula/axioms that will dictate treatment.
Clinical psychologists are trained heavily in maths and sciences relative to their sister degrees of PhD or Edd which are more academic than clinical in orientation.