本研究旨在探討臺灣成年早期個體的自我分化、身心適應與關係適應狀況、以及生活滿意度之關聯，並探討自我分化程度在身心適應與關係適應狀況和身心適應與生活滿意度之間是否具有中介效果。本研究參與者為介於二十歲至四十歲之間的台灣成年人，並採用網路問卷形式進行施測，共計蒐集482份有效樣本。研究使用「中文版自我區分量表」、「憂鬱焦慮壓力量表」、「關係適應量表」及「台灣簡明版世界衛生組織生活品質問卷」為研究工具，以皮爾森積差相關、階層迴歸分析及中介效果分析等統計方法檢驗研究假設，主要研究結果如下：
一、本研究樣本的自我分化程度與身心適應、關係適應狀況中的矛盾/衝突向度為顯著負相關，與關係適應狀況的滿意/成長、自主共生向度及生活滿意度則為顯著正相關；此外本研究樣本之身心適應與關係適應狀況中的滿意/成長、自主共生向度及生活滿意度為顯著負相關，與關係適應狀況中的矛盾/衝突向度則為顯著正相關。
二、本研究樣本之自我分化程度在身心適應與關係適應狀況間為部分中介效果。
三、本研究樣本之自我分化程度在身心適應與生活滿意度間具有部分中介效果。
最後，本研究綜合上述研究結果，提出本研究之限制與對未來相關研究以及臺灣成年早期個體諮商輔導實務之建議。

The study aimed to examine the relationships among psychological and relationship adjustment, differentiation of self, and life satisfaction among young adults in Taiwan. The role of differentiation of self as the mediators of the relationship between psychological adjustment and relationship adjustment, as well as the relationship between psychological adjustment and life satisfaction were examined. Participants of the study consisted of 482 aged from twenty to forty, and they completed the study questionnaire including the Chinese version of Differentiation of Self Inventory (C-DSI), Depression Anxiety Stress Scales-21 (DASS-21), Rating Scale for Relationship Adjustment, and the brief version of the World Health Organization Quality of Life (WHOQOL-BREF) Taiwan version. Pearson correlation, multiple hierarchical regression, and the mediation analysis were used to analyze data. Results of the study were as follow:
1. Differentiation of self is significantly negatively related to psychological adjustment and conflict/ambivalence subscale in relationship adjustment, while it’s also positively related to global satisfaction subscale and autonomous/symbiosis subscale in relationship adjustment, as well as life satisfaction. Psychological adjustment is significantly negatively related to global satisfaction subscale and autonomous/symbiosis subscale in relationship adjustment, as well as life satisfaction, but positively related to conflict/ambivalence part in relationship adjustment.
2. Differentiation of self partially mediates the relationship between psychological adjustment and relationship adjustment.
3. Differentiation of self partially mediates the relationship between psychological adjustment and life satisfaction
The implications of the findings and suggestions for counseling young adults and future research are discussed.

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