Abstract Information is now commonly consumed online, often displayed in conjunction with self-expression affordances (i.e., likes, votes) that create a sense of “self as source.” Sundar et al.’s (2015) theory of interactive media effects (TIME) conceptualizes such affordances as source interactivity (SI). An experiment examined medium effects of SI as well as message effects on attitudes. It tracked selective exposure to attitude-consistent vs. –discrepant political messages, to capture confirmation bias, and manipulated SI presence (affordance to up-vote or down-vote articles present or absent) as within-subjects factors. SI use and attitude change were captured. SI reduced selective exposure to attitude-consistent content. However, use of SI affected attitude reinforcement independently as well. Hence, users shaped their own attitudes both by selectively reading articles and expressing their views through SI. Directions for theory development are offered.

中文翻译：

---

只需点击一下即可进行自我表达 源交互性对确认偏见和政治态度的影响

摘要信息现在通常在网上消费，通常与自我表达可供性（即喜欢、投票）一起显示，从而产生“自我作为来源”的感觉。Sundar 等人 (2015) 的交互式媒体效果 (TIME) 理论将此类可供性概念化为源交互性 (SI)。一项实验检验了 SI 的中介效应以及信息对态度的影响。它跟踪选择性暴露于态度一致与不一致的政治信息，以捕捉确认偏见，并操纵 SI 存在（对存在或不存在的赞成或反对文章的支持）作为主体内因素。SI 使用和态度变化被捕获。SI 减少了对态度一致内容的选择性暴露。然而，SI 的使用也独立地影响了态度强化。因此，用户通过选择性阅读文章和通过 SI 表达他们的观点来塑造自己的态度。提供理论发展方向。