摘要：Purchasing decisions become an important thing in retaining customers. The purchase decision is a customer’s response to a discrepancy between the level of prior importance and the actual performance it perceives after use. As for the population is a student class of 2013. Samples taken in the study obtained for 96.04 then rounded up to 100 people. Based on the above calculation results, the number of samples taken in this study is the student class of 2013 as many as 100 respondents. Criteria of sampling as a resource is a social networking site users who have made purchases two (2) times through social networking sites. The result of research indicate that Ease, Quality of information, Quality of interaction have positive and significant influence to trust, Ease, Quality of information, Quality of interaction have positive and significant influence to purchasing decision, Trust influence positively and significantly to purchasing decision.
关键词：Ease; Quality of information; Quality of trust interaction; purchase decision.
