标题:427 児童集団内における個人間の親和反発の偏倚傾向 : 社会的知覚を歪める自我的欲求の要因 (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] 427. Bias-tendency among members in child group : distortion of social perception by ego-needs. (TITLE OF PAPERS AND THE SUMMARIES OF DISCUSSIONS : 12. Group dynamics and classroom groups) [in Japanese]