六〇年代後半から寺山修司は月刊受験雑誌『高３コース』『高１コース』の文芸欄の選者を務める。文芸欄での活動は、寺山の創作源の一つでもあった。実際、文芸欄での経験をもとに詩論『戦後詩』（一九六五）が書かれ、文芸欄の投稿者たちによって天井桟敷公演『書を捨てよ町へ出よう』（一九六八）が生まれていく。本稿では、寺山の詩論＝制作論を参考に、投稿者の作品空間において何が起こっているのかを内在的に分析する。投稿者たちが文芸欄で「書くこと」によって、自らの環境を相対化し実際に移動しながら、固有の領域を制作していたことを明らかにする。そして、そのような文芸欄の制作空間が、同時代の「町」とも地続きであることを示した。

The purpose of this study was to examine the fluctuation in the ability to manage lifestyle in childhood using the item response theory. The subjects of this study were 2373 children who went to public primary school. The analysis items were 35 items, each related to lifestyle areas of food intake, exercise, rest (sleeping and awakening), and hygiene and safety. We applied a 2-parameter graded model and calculated the item difficulty and discrimination. Further, the ability value of each subject according to the lifestyle domain was calculated. We analyzed the fluctuation in the ability value on each lifestyle domain. As a result of the analysis, we obtained the following three suggestions. 1) Hygiene and rest habits are easy to deteriorate in childhood—consistent education is essential throughout childhood. 2) The boys have to be re-educated about food intake and safety habits in the upper grades of elementary school. 3) With respect to girls, the greatest problems in the lifestyle are those regarding their exercise habits. A drastic effort at improving their exercise habits is necessary. An effective suggestion to improve the lifestyle was obtained by examining the fluctuation in the ability to manage lifestyle during childhood using the item response theory.