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Our 3-month experiment produced clear evidence of inadvertent learning among entertainment seekers. Entertainment seekers do not switch from a portal site to other websites, even when the choice of news is boosted, which in turn facilitates inadvertent learning and narrows the knowledge gap between news and entertainment seekers. Longitudinal analysis using a follow-up survey not only demonstrated that the inadvertent learning effect persisted even after 2 months of the experiment but also suggested that the effect spilled over to new learning opportunities. </jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380004236622975232","@type":"Researcher","foaf:name":[{"@value":"Tetsuro Kobayashi"}],"jpcoar:affiliationName":[{"@value":"City University of Hong Kong, Kowloon, Hong 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Hoshino"}],"jpcoar:affiliationName":[{"@value":"Keio University, Tokyo, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004236622975233","@type":"Researcher","foaf:name":[{"@value":"Takahisa Suzuki"}],"jpcoar:affiliationName":[{"@value":"Tsuda University, Tokyo, Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00936502"},{"@type":"EISSN","@value":"15523810"}],"prism:publicationName":[{"@value":"Communication Research"}],"dc:publisher":[{"@value":"SAGE 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