精神薄弱児の行動統制に果たす言語機能の役割 : 精神薄弱児のM.A.の検討(I)

抄録

An experiment was designed to determine the role of speech in the regulation of behavior of mentally retarded children from the mental developmental view-point, and to testify the meaning of MA measured by Binet-Intelligence-Scale as developmental stage of retarded children. Four groups (Table 1) of retarded children graded in MA were chosen as the subjects for the experiment of the formation of motor conditioned reflexes and voluntary movements through verbal reinforcement, and the results were compared with those of A.R. Luria's findings in normal children which assumed the parallel relationship between the mental level or chronological age and interaction of the first and second signal systems. The main results were as follows: (1) the increase of the responses in both speech and motor in the conceptual level with MA was confirmed, but (2) the function of speech as conditioned inhibitors in these retarded children did not confirm up to MA five, and (3) interaction of the first and second signal systems in feebleminded children was more retarded than in normal children and formed over MA seven, and (4) when we compared the content of speech of retarded children with that of normal children, we could disclose some quatitative characteristics of the retarded which were not identified by MA; e.g. the dominance of the mechanical words or absurd speech which was unsupported by the proper generalization or conceptualization of the speech.