标题:629-631 理科授業における「力」概念の形成(17.教科・教授過程(3),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] 629-631 Formation of "force" concept in primary school science (1)(17.Subject matters and teaching processes (3),PROCEEDINGS OF THE FIFTH ANNUAL CONVENTION OF JAPANESE ASSOCIATION OF EDUCATIONAL PSYCHOLOGY PAPERS AND THE SUMMARIES OF DISCUSSIONS) [in Japanese]