Includes bibliographical references and indexes.

Podcast adoption and use: Impact of diminishing variation of technology advantage page 29-52 - - Getting news from mobile phones: Innovativeness vs. personal initiative in second-level adoption page 53-79 - - Media dependency in the digital age: Effects of perceived channel efficiency and motivation and orientation of information seeking page 80-102 - - Openness, activeness, and diversity of information exchange in the context of online social networks page 105-125 - - Legal and extralegal faction in deterring online copyright infringement page 126-150 - - Willingness to contribute information to online communities: Personal and social influences page 151-171 - -Third-person effect, optimistic bias, and sufficiency resource in internet use page 172-194 - - What motivates online disagreement expression?: The influence of self-efficacy, mastery experience, vicarious experience, and verbal persuasion page 194-221 - - Disagreement expression and reasoned opinions in two U.S. online newspaper forums page 222-240 - - Participatory expressions in blogs and microblogs: An analysis of blogger's structural adaption in two Chinese news portals page 241-262 - - Likelihood of expressing minority views and issue difference in moral implications page 263-284 - - Contextual and normative influence on willingness to express minority views in online and offline settings page 285-306