本研究應用「年齡－時期－世代」觀點，探討台灣民衆的心理需求、疏離感及身心困擾程度的變遷，並檢驗此三類變項間可能存在的關係。使用「台灣社會變遷基本調查計畫」在1995年、2000年、2005年的調查資料，採取Yang and Land (2006a)的交叉分類隨機效應模型(Cross-Classified Random-Effect Model)，從個人層次、時期層次及世代層次分析心理需求、疏離感及身心困擾程度之所以出現差異與變遷的原因。主要發現如下：（一）台灣民衆的心理需求、疏離感與身心困擾隨著時期有顯著變化，心理需求隨時間降低、身心困擾隨時間增加、社會疏離感則成U型改變。（二）控制人口變項的效應後，心理需求、疏離感與身心困擾的世代差異並不明顯。（三）身心困擾隨著年齡成U型變化，40歲左右的台灣民衆身心最健康。（四）自我實現心理需求愈高，身心困擾愈少；疏離感愈高者，身心困擾亦愈高；但加入疏離感後，自我實現心理需求對身心困擾之影響消失。

The authors take the age-period-cohort effect perspective to examine relationships among Taiwan social change and Taiwanese psychological needs, sense of alienation, and mental-physical disorders. Data are from the 1995, 2000, and 2005 waves of the Taiwan Social Change Survey. Yang and Land's (2006) cross-classified random-effect model for individual, period, and cohort perspectives was used to analyze change over ten years. Results indicate that psychological needs decreased and mental-physical disorders increased; furthermore, sense of social alienation changed in a U-shaped pattern. In terms of age, a U-shaped pattern was also identified for mentalphysical disorders, with respondents in the 40-year-old group reporting the least. The results also indicate a connection between higher self-actualization and fewer mental-physical disorders, as well as between higher sense of alienation and increased mental-physical disorders. Furthermore, the influence of psychological needs on mental-physical disorders disappeared after controlling for the sense of alienation.