Positively useless: irrelevant negative information enhances positive impressions
研究发现在线评论中，无关的负面信息（如一星评价）与正面评论并存时，反而能提升消费者对产品的偏好，因为消费者觉得信息更完整。
Abstract This research examines the impact of irrelevant information and its valence (positive or negative) on consumers' evaluations, choices, and post‐choice satisfaction, within the context of online reviews. We demonstrate that seemingly irrelevant online reviews can enhance positive impressions, but only if they are labeled with a negative valence (e.g., with a one‐star rather than a five‐star rating). A series of studies provides support for this positive effect of negatively valenced irrelevant information; namely, the inclusion of a negatively valenced irrelevant review alongside positive reviews leads to greater product preferences, as consumers feel confident that the information they have about the product is more complete. We also demonstrate the moderating role of review source.