标题:833 言語習慣形成における健聴児とろう児のちがいについて (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 : 21. 言語障害・聴力障害 (1)) [in Japanese] 833. Difference in formation of verbal habit between normal and deaf children. (TITLE OF PAPERS AND THE SUMMARIES OF DISCUSSIONS : 22. Speech and hearing Difficulties (2)) [in Japanese]