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- W2766202288 abstract "Information intermediaries like search engines and social networks can represent a source of bias for recipients. Their algorithms, especially concerning filtering, sorting, and personalization, are assumed to skew the representation of news topics and thus create media effects in their own right. Largely as a result of methodological challenges, existing studies have often tested isolated hypotheses without covering the full effects chain from content production to reception by the user. However, the preselection of content performed by intermediaries is only relevant if users choose to rely on it, an assumption that so far lacks broad empirical evidence. Based on a broad review of existing study designs, this article develops a general intermediary effects model. From this model, researchers can derive empirical study designs that capture and differentiate the individual effects of filtering, sorting, and personalization. We then apply the model in an assessment of the news aggregator Reddit's change in capacity to influence its users’ information selection. Using counterfactual time series decomposition, we show that changing the sections of the website included in the start page by default can lead to large changes in attention paid to content. These findings substantiate existing assumptions about the power of information intermediaries to shape the information environments of their users. 种面向信息接受者的偏见来源。信息中介的算法, 尤其是有关过滤筛选、分类和个性化的算法, 被认为能够影响新闻话题的准确性, 并由此依照自身的方式产生“媒介效果”(media effects)。作为方法论挑战的结果, 现有研究在很大程度上时常没有覆盖全效果链(full effects chain)(从内容制作到用户接受这一过程)便测试孤立的假设。然而, 有假设认为, 信息中介对内容的预选过程仅在用户选择依赖这一操作的情况下才会出现, 这个假设目前还缺乏广泛的实证数据。基于对现有研究设计的广泛检查, 本文提出了“一般性的中介效果模型”(general intermediary effects model)。研究者能从该模型获得实证研究设计, 后者能捕捉过滤筛选、分类和个性化的单独效果, 同时加以区分。本文随后将该模型用于评估新闻聚合器Reddit在影响用户进行信息选择时的能力变化。通过使用“反事实时间序列分解法”(counterfactual time series decomposition), 本文表明, 通过默认设置改变网站首页的不同部分, 能导致用户对网站内容注意力的大幅变化。这些研究结果证实了有关信息中介能力的现有假设, 即中介能影响用户的信息环境。 búsqueda y las redes sociales pueden representar una fuente de sesgo para la audiencia. Sus algoritmos, especialmente los que filtran, separan y personalizan, podrían sesgar la representación de nuevos temas y por ende crean efectos mediáticos por sí solos. En gran parte debido a desafíos metodológicos, existen estudios que han puesto a prueba frecuentemente las hipótesis aisladas sin incluir la cadena completa de efectos desde la producción de contenido a la acogida por parte del usuario. Sin embargo, la preselección de contenido que hacen los intermediarios es solo relevante si los usuarios eligen apoyarse en ella, lo cual es una suposición que hasta ahora carece de evidencia empírica general. Con base en una examinación general del estudio existente, este artículo desarrolla un modelo general de los efectos de intermediarios. Desde este modelo, los investigadores pueden derivar diseños de estudios empíricos que capturan y diferencian los efectos individuales de la filtración, la separación y la personalización. Después aplicamos el modelo en una valoración del cambio del sitio de foros Reddit en su capacidad de influenciar la selección de información de sus usuarios. Al utilizar la descomposición de series cronológicas erróneas, mostramos que las secciones cambiantes de la página que están incluidas en la página principal de forma predeterminada pueden llevar a grandes cambios en la atención que se le da al contenido. Estos hallazgos solidifican suposiciones existentes acerca del poder de los intermediarios de la información para dar forma a los ambientes de información de sus usuarios. Additional Supporting Information may be found online in the supporting information tab for this article. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article." @default.
- W2766202288 created "2017-11-10" @default.
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- W2766202288 date "2017-10-25" @default.
- W2766202288 modified "2023-10-18" @default.
- W2766202288 title "The Power of Default on Reddit: A General Model to Measure the Influence of Information Intermediaries" @default.
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- W2766202288 doi "https://doi.org/10.1002/poi3.166" @default.
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