@article{oai:ir.kagoshima-u.ac.jp:00007662,
 author = {岡田, 猛},
 journal = {鹿児島大学教育学部研究紀要. 人文・社会科学編, Bulletin of the Faculty of Education, Kagoshima University. Cultural and social science},
 month = {2016-10-28},
 note = {This investigation partially confirmed the existence of the relative age effect in wrestlers of Sumo, a traditional sport in Japan. In 1960, 1980, 2002 and 2010 Sumo wrestlers of upper classes from yokozuna to makushita were analyzed for relative age effect. Chi-square test (X^2) and spearman rank-order correlation (rs) were calculated as test statistics. The results were followed; 1960 : X^2_{(3)}=1.620p=.655, rs=-.126p=.697 1980 : X^2_{(3)}=16.133p=.001, rs=-.727p=.007 2002 : X^2_{(3)}=3.653p=.609, rs=-.042p=.897 2010 : X^2_{(3)}=5.780p=.123, rs=-.629p=.028 The relative age effect was significant in especially1980 and 2010. In 1980 the preexisting rival star wrestlers were inferred to be significant others for relative age effect of wrestlers.},
 pages = {69--79},
 title = {相対的年齢としての生まれ月と高度スポ－ツへの社会化 : 大相撲},
 volume = {62},
 year = {}
}