本研究之目的在於瞭解國中學生的群性表現，和性別、年椒、學校所在地、班級類別及學業成就地位之關係。經以自編之「國民中學學生團體活動表現評量表」，委託五十四所國中之導師協助評量，最後以633個有效樣本分析的結果發現：(1) 受評樣本的群性行為表現，稍為積極而已；(2) 受評學生的群性表現及行為，與學生就讀之年級、學校區域無關；(3) 教師對學生群性表現的評量，與學生的性別無關；但愛護公物、遵守秩序兩種行為，卻與性別具有密切的關係；(4) 國中生的群性表現及其行為，與學生就讀之班級類別、學業成就地位有密切的關係。 依據以上的發現，本研究提出下列建議：(1) 建立合理而可行的群育考評制度；(2) 力謀德育與群育考查之完全分立；(3) 統一考查群育之內容與水準；(4) 改進教師考評群育成績的態度；(5) 注重學生群性行為的輔導；(6) 發揮輔導工作的功能；(7) 擴大舉辦並鼓勵學生參與有益身心的活動；(8) 擴大有關學生群性行為的評量研究。

The purpose of this study is to investigate the relationship between the teachers' ratings of student's expression behaviors in group activity and 5 variables. There are 633 effective samples were selected from 54 Junior High School, were rated by their teachers. The results of this study were indicated as follows: (1) The students' expressive behavior of Junior High Schools in group activity by teachers' rating leaned toward positive; (2) There are no significant difference between Teachers' Ratings of Students' Expressive Behaviors and their Grades or Enrollment District. (3) There is no significant difference between Teachers' Ratings of Boy Students' Expressive Behaviors and Girl Students' but on the two aspects of Take Good Care of Public Property and Keep The Order are very significant difference between Boy and Girl Students. (4) There are very significant difference on Teachers' Ratings of Students' Expressive Behaviors among Three Different Kind of Class, or High, Middle and Low Achievement Student. On the end of this study, 9 suggestions were offered as follow: (1) to build a certification system of Community Services Ratings, that will be reasonable and workable. (2) to separate complete Rating the Morality Education and Community Services Education. (3) to integrate the Assessment on The Contents and Level of Community Services. (4) to strengthen the Attitude of Teachers' Ratings. (5) to stress the Guidance of Students' Behaviors. (6) to improve the Function Will of School Guided Work. (7) to encourage the student to joing activity that will be useful their Physics and Spirits. (8) to continue and expand the Study of Group Activity Behaviors.