标题:409-411 双生児による人格形成の研究 (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 : 10. 親子関係・家族関係) [in Japanese] 409-411. A study of personality formation through the twin research. (TITLE OF PAPERS AND THE SUMMARIES OF DISCUSSIONS : 10. Family and parents-child relationships) [in Japanese]