著者

末木 新 SUEKI Hajime

出版者

日本自殺予防学会

雑誌

自殺予防と危機介入 (ISSN:18836046)

巻号頁・発行日

vol.39, no.2, pp.94-101, 2019-09

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本研究の目的は、自殺念慮尺度の短縮版を作成し、その信頼性・妥当性を検証することである。自殺方法に関する表現を含む項目を除外し、安全な測定を実現することも尺度短縮の目的である。自殺の研究者および自殺予防に従事する臨床家が13 項目版の自殺念慮尺度の項目内容を検討し、内容的妥当性を確保した上で短縮版に含める項目を選定した。その結果、6 項目を短縮版に含めることが適当だと判断された。次に、選定した6 項目版の自殺念慮尺度の信頼性および妥当性を検討するため、二波のパネル調査を実施した(N=2,486)。その結果、短縮版自殺念慮尺度は、高い内的一貫性(Cronbach's α=0.89)、4 週間後の得点との再検査信頼性(Spearman's ρ=0.84, P<0.001)、構造的妥当性、十分な構成概念妥当性を有していることが示唆された。

著者

末木 新

出版者

一般社団法人 日本体育学会

雑誌

体育学研究

巻号頁・発行日

vol.62, no.1, pp.289-295, 2017

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Baseball is a thriving sport in Japanese high schools. However, there have been demands to shorten the instructional time for school extracurricular activities, resulting in a need to increase the effectiveness of such instruction. The present study was designed to examine the effects of 3 elements of team strength in high school baseball&mdash;pitching strength, batting strength, and defensive strength&mdash;on the outcome of a game. The materials used for analysis were the records of all of the 390 games and 780 teams involved in the National High School Baseball Championship from 2008 to 2015. Pitching strength, batting strength, and defensive strength were calculated using Fielding Independent Pitching (FIP), On-base Plus Slugging (OPS), and Defensive Efficiency Rating (DER), respectively. Logistic regression analysis (forced entry method) was conducted on the game outcome as the dependent variable and team FIP, team OPS, and DER as the independent variables. This analysis showed that the team FIP (odds ratio 0.80, 95% confidence interval 0.74&mdash;0.86), team OPS (odds ratio 8145, 95% confidence interval 1957&mdash;33898), and DER (odds ratio 5699019, 95% confidence interval 341274&mdash;95169408) were significantly associated with the outcome of the game. An assessment of the Wald statistic, which indicates the contribution rate of the dependent variables, showed that batting strength had the strongest effect on game outcome, followed by defensive strength. Compared to batting and defensive strength, pitching strength appeared to have only a small influence on game outcome. Therefore, for efficient improvement of team strength, it is considered that resources should be directed towards improving batting and defensive strength over pitching strength.<br>

著者

末木 新 伊藤 次郎

巻号頁・発行日

2017

著者

末木 新

出版者

東京大学大学院教育学研究科

雑誌

東京大学大学院教育学研究科紀要 (ISSN:13421050)

巻号頁・発行日

vol.49, pp.277-284, 2010-03-10

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The purpose of this study was to review CMC (Computer-Mediated Communication) theories in order to unify the ambivalent functions of suicide message boards, namely the suicide-preventive function (e.g., self-help group) and suicide-inducing function (e.g., Internet suicide pact). The study also aimed to clarify the research task that was not treated in the existing theories. In this study, as a major CMC theory, Cues Filtered Out, Hyper Personal Communication, and the Social Identity model of Deindividuation Effect were introduced and considered in terms of their relation to suicidal communication via the Internet. In addition, ease of reusing postings and emoticons were considered as a feature of CMC that cannot be treated by the above theories. By using the above process to construct a web-based communication system with suicide-preventive functions, it was shown that future research is necessary to study the interaction between the user's personality and the technical features of CMC.