本文依受訪者與不同住親屬之互動關係提出一個新的家庭分類法，不但可與傳統分類法互補，而且可以用來檢視親人間的互動是否可以跨越同住的限制。文中以互動頻率與居住距離兩個面向來界定互動關係，兩個面向各再分兩類，共計四種類型，即新式擴大家庭、散居家庭、疏離家庭，與孤立家庭。我們利用台灣社會變遷第四期第二次調查資料進行實證分析，發現新式擴大家庭在四種類型中所佔比例最高，此類家庭的主要決定因素包括教育、工資、宗教、住屋所有權、子女奉養，與是否分產等。其中，後兩點顯示傳統價值與財產的積聚或分享乃是臺灣家庭型式變化相對較少的主因。而新式擴大家庭對社會支持的交換較他類家庭比例為高，說明互動頻繁與居住鄰近是家庭維繫的主因。

In response to industrialization and urbanization, changes in the form and function of family seem inevitable. In the study of family decline, a new typology of family is advanced that is based on kin relationships beyond co-residence boundaries. Four subtypes of family are distinguished according to contact frequency and spatial proximity, namely, the neo-extended, dispersed, alienated, and detached sub-types of family. Analyzing data collected from the fourth round of Taiwan Social Change Survey, we have identified the main determinants in the formation of a neoextended family, which include respondents’ socioeconomic status (education, wages, homeownership, religiousness), degree of adherence to traditional value, and whether or not family property has been divided. Moreover, we have found that most respondents belong to the neo-extended family, and exchanges between the respondents and their close relatives are relatively high. These findings point out that family function has been maintained despite of the progress of the nuclearization, due mainly to frequent contact and residential proximity between non-coresiding families.