Westerwick Axel, Johnson Benjamin K, Knobloch-Westerwick Silvia
a School of Communication , Ohio State University.
b Department of Communication Science , Vrije Universiteit Amsterdam.
Health Commun. 2017 May;32(5):639-649. doi: 10.1080/10410236.2016.1160319. Epub 2016 Jul 1.
Health information is often sought online, despite varying credibility of online sources, and may shape health behaviors. This investigation builds on the Selective Exposure Self- and Affect-Management model to examine selective exposure to online health information from low- and high-credibility sources and subsequent effects on attitudes toward health behaviors. In a lab study, 419 participants accessed online search results about health topics. The display varied messages in a 4 × 2 × 2 all within-subjects design, with topic as a four-step factor (organic food, coffee, fruit and vegetable consumption, physical exercise) and source credibility (low vs. high) and issue stance (promoting vs. opposing health behavior) as two-step factors. Displayed messages either promoted or opposed the related behavior. Results showed that perceiving greater standard-behavior discrepancy (between recommended behavior standards and own behavior) fostered behavior-related attitudes through selective exposure to messages promoting that behavior. The effects from selective exposure to health messages on attitudes occurred regardless of associated source credibility.
尽管网络信息来源的可信度各不相同，但人们经常在网上寻求健康信息，这些信息可能会影响健康行为。本研究基于选择性接触自我与情感管理模型，考察了对来自低可信度和高可信度来源的网络健康信息的选择性接触，以及随后对健康行为态度的影响。在一项实验室研究中，419名参与者访问了有关健康主题的在线搜索结果。展示内容采用4×2×2全被试内设计呈现不同的信息，其中主题为四水平因素（有机食品、咖啡、果蔬消费、体育锻炼），来源可信度（低与高）和议题立场（促进与反对健康行为）为两水平因素。展示的信息要么促进要么反对相关行为。结果表明，感知到更大的标准行为差异（推荐行为标准与自身行为之间）会通过选择性接触促进该行为的信息来培养与行为相关态度。无论相关来源的可信度如何，选择性接触健康信息对态度的影响都会发生。
