Theoretical-methodical problems of psychodiagnostics are considered in
the framework of system approach. The problem of connectedness and th
e necessity of informanional-structural synthesis are of first importa
nce. System approach is used for the determination of measured individ
uality theory. The paradox of differences in theoretical and psychodia
gnostical description of the same phenomenon may be overcome by way of
''measured individuality'' introduction. This theory takes the interm
ediate position between global theoretical models and specific researc
h ones.