Social complementary dyads: historical trends of evolution

Subject of research: "social complementary dyads" as a socio-psychological phenomenon. The object is social groups phenomena, the subject small (microgroups) in processes their historical evolution.
 Methods historical-theoretical, analysis empirical studies on subjects interactions. phenomenon dyad one forms discussed.
 Main results typology dyads has been proposed: 1) (SDS); 2) supporting structures; 3) professional (complex groups); 4) creative (creative dyads); 5) related; 6) spontaneous; 7) destructive (parasitic, exploitative); 8) antisocial. In view trends increase types and varieties, it believed that field education most urgent problem first type (SDS), represented by such combinations "educator educated", "teacher student", student, etc. Open questions are singled out (study paradigm individual rather than joint activity; binarity group classifications; unresolved issues lower upper limits generation functioning groups; evolution dyad, etc.); promising aspects further research discussed (the resources, individuality complementarity qualities interacting subjects, possibility directed formation control dyads, etc.).