标题:404 きようだいの位置と性格(9.家族関係,日本教育心理学会第5回総会部門別研究発表要旨・討論の概要) [in Japanese] 404 Personality of children as related to their siblings(9.Family relationships, PROCEEDINGS OF THE FIFTH ANNUAL CONVENTION OF JAPANESE ASSOCIATION OF EDUCATIONAL PSYCHOLOGY PAPERS AND THE SUMMARIES OF DISCUSSIONS) [in Japanese]