根據美國National Endowment for Financial Education 2010年的調查，過去一年內80%的受訪者從事過衝動購買，可以認為衝動購買的發生十分普遍。衝動購買行為在過去數年已經受到多方領域的探討與研究，產出了豐富且重要的研究成果；隨著網際網路的出現，許多學者開始注意到網路對於線上或離線衝動購買的影響，但網路口碑對於衝動購買行為的影響尚有許多探討之空間，因此本研究的目的為探討網路口碑的資訊從眾對於消費者衝動購買之影響，以及商品需要和購買制約因素構成的干擾效果。本研究透過網路問卷進行研究資料的蒐集，調查對象為過去半年內曾經閱讀過某一商品網路口碑的網路使用者，共得有效樣本528份。研究結論為：
1. 消費者的網路口碑資訊從眾程度對於其閱讀商品網路口碑之後所產生的商品慾望具有正向影響，當網路口碑資訊從眾程度越高時，消費者閱讀口碑後的商品慾望程度也越高。此外，消費者受口碑影響後所產生的商品需要認知並不會干擾資訊從眾程度對於商品慾望的影響。
2. 消費者對於商品的慾望越高、衝動購買的意圖也越高。衝動購買意圖越高時，消費者衝動購買行為從事衝動購買的可能性也越高，並且只要稍加提高消費者的衝動購買意圖，衝動購買的可能性將大幅上升。
3. 衝動購買制約因素對於消費者的衝動購買意圖發展為衝動購買存在阻止效果，當消費者感受到制約因素時，衝動購買的發生可能性將降低。而主要會阻止消費者衝動購買的因素為「可運用購買預算的限制」。

本研究能提供給學術界與實務界進行衝動購買的研究參考與購物網站經營管理的規劃運用。

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