本研究係「我國國民教育階段中兒童及青少年身心發展之研究」三年連續性計劃中第二年的研究成果。研究目的在探討我國國小及國中學生自我觀念特質的發展趨勢，自我觀念特質改變量之性别間的差異，及年段間的差異。研究對象係選自臺北市及臺北縣兩所國民小學，及兩所國民中學，共687人（男生335人，女生352人）。以自我觀念測驗衡鑑受試者之八項自我觀念特質。其主要的發現如下： 1．國小學生，及國中男生八項自我觀念特質一年間沒有顯著的改變，而國中女生則在自我認定、自我行動兩項特質上，顯示着減低的趨勢。 2．國小男女生八項自我觀念特質一年間改變量沒有顯著的差異，而國中男、女生「家庭自我」特質的改變量有顯著的差異。 3．三個年段學生自我觀念特質之改變量沒有顯著之差異。

This is a part of a three year longitudinal study on the physical and psychological development of Chinese school pupils. A total of 687 youngsters (335 males, 352 females) were sampled from two elementary schools and two junior high schools in Taipei. The self concept scale, followed the Tennessee Self Concept Scale, was administered to the subjects twice in the regular class settings (one year interval). This study treated the year's changes of scores of self concept scale as criteria, sex and grade level as independent variables, the statistical analyses revealed that: 1. The self concept characteristics of elementary school boys and girls, and junior high school male students did not change with age while some of self concept characteristics of junior high school female students descended with age. 2. The sex differences of changes of self concept characteristics were not significant in elementary school, the same was found in junior high shool, except one of those characteristics family self. 3. The effects of grade level on the changes of self concept charatericstics were not significant for males and females.