The researches done by practical psychologists demonstrated that preadolescents development from institutions differ from the development of their peers from complete favorable families .Accomplishing a comparative survey of preadolescents brought up in complete favorable families and those of orphans brought up in boarding schools (each experimental lot comprising 30 children) and using as methods of diagnosis Rosenzweig test of investigating frustrating tolerance (the variant for children) and Bass and Darky test of diagnosing the aggressive states of preadolescents , which were statistically worked out with the help of SPSS method I came to the following conclusions: the preadolescents from complete favorable families are stated more on obstacle than their peers brought up in boarding schools 'that differs from the opinion of many psychologists. (A.M.Prihojan and N.N.Tolstih) This is because of changing the norms, values , the statute of a modern family and is contradictory with the existing beliefs in psychology. according to the opinion of many authors (Dollard, Doob Miller,Mowrerand Sears) frustration leads to the appearance of a certain form of aggressiveness. In case of preadolescents brought up favorable families that react to frustrating situations, based on obstacle, this is reflected through verbal and indirect aggressiveness. Preadolescents brought up in boarding schools ,being in frustrating situations often react concentrating on satisfying their own needs because in most cases their needs are not satisfied. Preadolescents, brought up in boarding schools more often manifest physical aggressiveness. According to some concepts that explain the appearance of aggressiveness to orphans by the fact that aggressiveness is a consequence of unsatisfied necessity of maternal and paternal love. Preadolescents from boarding schools possess a high degree of offence as a consequence of their increased vulnerability. Institutionalized preadolescents manifest tendencies of a self- oriented reaction to frustrating situations. Intropunitive reactions of children from institutions denote selfaggressiveness; self-blaming and a sense of guiltiness; which appeared on an emotional depravity background. Suppose, that this is due to certain characteristics of these children: self For rising the level of self appreciation and that of self respect of preadolescents brought up in boarding schools it is necessary of approval,stimulation, encouragement from the adults. Evidently, this implies a special training of boarding schools" staff, especially that of instructors and teachers. distrust, fear, as well as avoidance of complicated situations.