Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 大石 千歳 and 吉田 富二雄,The ‘black sheep effect’ : Discrimination against an ingroup member whothreatens the social identity of the group,Tsukuba Psychological Research,0915-8952,筑波大学人間系心理学域,1998-03-10,20,,163-171,https://cir.nii.ac.jp/crid/1050282677529129600,