背景：臺灣高齡少子問題隱含著親代與子代共居的機會將逐漸下降，如何幫助老年人選擇符合期待的居住安排為重要議題，丹麥「共居住宅」，共用廚房、客廳等公共空間，並保有私人的房間，研究者也很嚮往此型態居住方式，故延伸出探討共居的研究想法。
目的：本研究目的即為應用計畫行為理論探討退休人士參與共居行為意向，期待本研究結果可提供高齡者在居住安排上的另一個選擇。
方法：本研究採橫斷性研究設計，研究對象為臺中市豐原區社區發展協會關懷據點之退休人士，以計畫行為理論（行為態度、主觀規範、知覺行為控制）為研究基礎，自擬結構式問卷進行調查，再以多元邏輯斯迴歸分析驗證計畫行為理論三大構面、人口變項與共居意向間之關係。
結果：本研究共發出299份問卷，回收297有效回收問卷，回收率達99.3%。研究結果發現三構面，對共居行為意向有顯著的預測力與影響(X2=82.884，p=.001)，顯示據點的多數退休人士對共居意願抱持正向的看法；其中知覺行為控制的指標值為(12.645，p=.001)，表示此變項可以有效預測共居意向。
結論：本研究可知教育程度、職業、共居知覺行為控制與影響退休人士共居行為意向預測有關。
Background: Taiwan’s declining fertility rate and aging society imply that the chances of live together between parents and children will gradually decline. How to help the elderly to choose the house arrangements that meet expectations is an important issue. Denmark has a "common residence". Everyone shares the public space such as the kitchen and the living room, and keep their own private room. Researcher also longing for this lifestyle. I extend this idea and have the study.
Objective: The purpose of this study is to understand the Application of Theory of Planned Behavior to Study the Influencing Factors of Retirees' Participation in Cohousing . It is expected that the results of this study will provide another option for senior citizens in their house arrangements.
Methods: This study adopted cross-sectional research design, and the research object are the retirees of Fengyuan District Community Development Association, Taichung City. Taking the Theory of Planned Behavior (attitude, subjective norm, and perceived behavior control) as the research basis, through the self-designed structure. The statistical analysis part was carried out, and the relationship between the three major facets of the project behavior theory, the demographic variables and the cohousing intention were verified by multivariate logistic regression analysis.
Results: A total of 299 questionnaires were sent out, and 297 valid questionnaires were collected, with a recovery rate of 99.3%. The study found that the three facets have significant predictive power and influence on the intention of cohousing behavior (X2=82.884, p=.001), indicating that most retirees at the stronghold have a positive view on the willingness to live together; The indicator value is (12.645, p=.001), indicating that this variable can effectively predict the cohousing intention.
Conclusion: This study shows that education level, occupation, and cohousing perceived behavior control are related to the prediction of the intention of cohousing behavior of retirees.
