But they encourage people to retrieve only information and commentaries that fit their existing views. While traditional media can present their readers with balanced coverage, digital media can fuel political polarization.
以媒体为例。如今只有16%的40—50年龄段美国人读（印刷）报纸；20岁以下人群比例更是只有6%。数字媒体提供了充分的多样性、轻易的获取渠道和评论机会。但它们也鼓励人们只接受符合既有观念的信息和评论。传统媒体可以为读者呈现平衡的报道，数字媒体则可能助长政治两极分化。