Psychodiagnostics - branch of psychology, detect individual
features and determine prospects of personal development. It is
theory and practice of psychological diagnosis targeting to solution
of psychological problems. To the point,
Psychodiagnostics originate from Greek psyche - "soul" and
diagnostikos - "able to recognize". Therefore
Psychodiagnostics means "ability to recognize a soul".
Main method of Psychodiagnostics - testing. Professional tests
should be: 1 Valid - test should be able to measure
exactly that characteristics on which it was targeted. 2
Reliable - exactness of psychological measurements, minimal
error of testing procedure. It leads to stability of testing results
and to equivalence with other tests that are identical in form and
goal of testing. 3 Scientific - connection with
fundamental reseach
Today you can find tests of any
theme and not all of them suits to above criteria.
Tests usually
give only some slice for current moment but most of man's features
and behaviour able to dynamic changes. And there isn't test that
would able estimate human person "totally".
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Today you can find tests of any
theme and not all of them suits to above criteria. 
Tests usually
give only some slice for current moment but most of man's features
and behaviour able to dynamic changes.