本研究由人格特質出發，觀察消費的思考途徑所產生的效果。研究的對象主要分成單人與朋友陪伴，經由網路進行問卷調查，影響消費者行為的幾個重要因素及心理機制。更明確的說，本研究由個人層次著手，直接探討獨立/互賴自我構念的人格特質在思考模式上的差異，並且藉由思考途徑，推出個人對產品價值需求上的關係。 接續研究朋友的影響，將其視為「捷思式線索」，探討消費者在友人的陪伴之下，是否形成對產品形象購買意願上的改變。「捷思式線索」顧名思義即為能供消費者透過簡單決策影響消費者判斷之變數。而這樣的線索，可能會導致獨立自我構念者的消費者轉向捷思式的思考途徑而反向改變原本對產品形象與自我形象一致性的消費習慣。 本研究由捷思式-系統式訊息處理模型推論：在朋友的陪同之下，獨立自我構念者同時會進行捷思式之訊息處理途徑。運用便捷快速的捷思式線索作為判斷與決策之基礎下，將對形象一致性的效果差距較不明顯，甚至可能出現追求與自身人格特質相反的產品需求。 下一步本研究以自我監控為調節變數，探討自我監控的人格特質為個人對社會情境做調適的行為模式。面對有朋友陪伴的情境，高度自我監控者會調適自己的行為，亦之，只有在社會情境提供過少的線索的情況之下，高度自我監控者的表現出最原始的自己。因此獨自購物時，表現應如上述所預期。但當高自我監控者與朋友相約一同消費，對於社會的適切性相對有較迫切的需求，而會根據朋友的性格或相處方式而注意或調適自己的行為；相反地，低自我監控者對是否符合社會適切性感到不關心，傾向表達自我內心的真正的感受，依據原本的思考途徑做選擇，而不會因為身旁的友人而刻意調整自己的行為。 本研究發現互賴自我的消費者對自我表達產品的需求會因為消費者本身是否為高自我監控者而受到影響。若能採用心理測試工具，相信可準確發現不同自我構念及自我監控的消費者對自我表達產品的歸因基礎，並以此結果對消費者的選擇做更符合需求的預測。 關鍵字: 自我構念、思考模式、自我監控 / Social influences play a persuasive role when it comes to spending. Previous research has shown that friends help shape our affects, behavior and cognitions (Argo, Dahl, and Machanda 2005; Ratner and Kahn 2002). Thus, the presence of an accompanying friend might to an extent influence the original consumption due the course that consumers have the opportunity and the motivation to conform to the expectation that their friends have in them (Funder and Colvin 1988; Stinson and Ickes 1992). To date, researchers have studied many social characteristics to which the presence of a friend determines the consumer’s purchase. Across studies show that friends can influence consumers’ purchase intentions in a positive way by providing information in reducing perceived risk (Urbany, Dickson and Wilkie 1989). Further on, studies demonstrates that the mere presence of a friend might cause agentic (oppose to communal) shoppers to spend more (Kurt, Inman and J.Argo 2010). Based on preceding studies, we implement experiments to first determine which factors with the influence of social presence matters, followed by studying how they change the way we perceive information and eventually lead to purchase intentions of either self or non-self expressive products. Study 1, measuring the orientations by the effect of the social environment ( ie, presence vs. absence of a friend). Study 2 used self-monitoring as moderator. In the findings, this research shows that independent construct is correlated with systemic thinking while dependent construct is related to both thinking style. It was unpredicted the way dependent construal person thought, and the results was therefore insignificantly related to the types of product chosen. With friends, however, findings show that systemic thinking has no effect on buying self-effective products when it comes to co-consumption. On the other hand, customers that are accustomed to heuristic thinking bring out higher willingness to buy self-expressive products.