交換關係之過程與結果的可預測性，不僅是消費者在從事網路交易時所關心的議題，也是管理領域和行銷學者在探討消費者購前行為時關注的焦點。而可控性、信任和購前期望，對於交換關仯之過程與結果的影響，一直以來都扮演了重要的角色。但是卻很少有學者深貨探討三者間的關係，以及於交易意圖之影響。因此，本研究透過以信任概念為核心，進行可控性、購前期望與信任三個觀念的整合，並探討三者對於消費者在網路交易意圖之影響。研究結果顯示，消費者在面對網站時，會產可控性和值得信任的知覺。其中可控性會對信任意圖產生負向的影響，而值得信任則對消費者的購前期望和信任意圖兩者產生正向且顯著的關係。此外，消費者的購前期望對於其交易意圖之間，則必須要透過信任意圖的中介，才能產生影響，信任意圖為消費者產生交易意圖之重要中介變數，且其概念應被視為態度。

The predictability of the process and results involved in an exchange relationship is not only of concern to consumers practicing network transactions, but also a focal point for management and marketing scholars studying pre-purchase behavior of consumers. Controllability, trust, and pre-purchase expectations, furthermore, have always played a key role in influencing the process and results of exchange relationships. To date, however, few scholars have explored their interrelationships and their impact on transaction intention. Hence, this study uses trust as a central concept for an integrated research on the influences of controllability, trust, and pre-purchase expectations on consumers’ transaction intention. Our findings reveal that the webpage scenario generates in the consumer two types of perceptions: controllability and trustworthiness. While controllability produces a negative effect on consumer’ trust intention, trustworthiness produces a salient positive effect on consumer’ pre-purchase expectations and trust intention. Furthermore, pre-purchase expectations must be mediated by trust intention to exert influences on transaction intention. Trust intention is therefore an important mediating variable leading to transaction intention in the consumer, and should be regarded as an attitudinal concept.