The results of experimental study of interaction and attachment betwee
n mother and infant in risk groups are reviewed. Complicated relation
to mother is usually formed in prematurely born, having <<difficult te
mperament>>, genetically threatened by development retardation childre
n. Mothers suffering depression and those with unsteady parental behav
ior were examined. The breach of interaction with the nearest person i
s considered to be social and sensoric deprivation for an infant and d
isturbance of individual development as well as a threat for psychic h
ealth.