标题:425 学級成員相互関係の改善性の予見について (日本教育心理学会第4回総会部門別研究発表要旨・討論の概要 : 12. 集団力学・学級集団) [in Japanese] 425. On the prediction of the possibility of improvement of the interrelationships among class members. (TITLE OF PAPERS AND THE SUMMARIES OF DISCUSSIONS : 12. Group dynamics and classroom groups) [in Japanese]