User-generated product reviews on the internet: the drivers and outcomes of the perceived usefulness of product reviews

This study examines how people cope with the user-generated product reviews (UGPRs) found on various websites where anonymous web users post and share their personal product usage experiences. Based on information processing model of communication, we postulate that there are source, message, media, and receiver factors to influence individuals' psychological processing of the UGPR messages, and its subsequent behavioral outcomes. A survey was administered by a professional market research firm to 262 randomly selected US residents from 18 to 55 years old. Consistent with the predictions, the results of the structural equation modeling analysis showed that the perceived source expertise, message objectivity, website credibility, and receiver–source similarity had positive and direct impacts on the perceptions of UGPR usefulness, which, in turn, positively influenced individuals' willingness to share product reviews with others. A series of causal model invariance tests also confirmed that the findings were statistically invariant across different subgroups divided by such factors as product categories, websites, subjective product class knowledge, past UGPR experience, and the susceptibility to informational influence.