One of the most consistent findings in experimental studies of social dilemmas is the positive influence of face-to-face communication on cooperation. The face-to-face `communication effect' has been recently explained in terms of a `focus theory of norms': successful communication focuses agents on pro-social norms, and induces preferences and expectations conducive to cooperation. 1 Many of the studies that point to a communication effect, however, do not further explore whether and to what extent the communication medium affects cooperative behavior. In this article, we ask if pro-social behavior can emerge and survive in computer-mediated environments. We show that, like face-to-face communication, computer-mediated communication also positively affects cooperation in social dilemmas, but cooperation is more difficult to establish and maintain. We argue that the discrepancy between the computer-mediated and the face-to-face communication effects is a consequence of the distinct capabilities of different media to focus agents on pro-social norms and to allow them to develop mutual expectations about future behavior.

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The article analyzes how community members who were evacuated from their homes use various media, and especially the internet, to keep in touch, receive and disseminate information and express their opinions. Of particular interest are the differences between members of various groups, who differ in their decision whether to relocate in Israel with the rest of the original community or not, in media usage patterns and sense of community. The findings demonstrate that evacuees use diversity and multiplicity of media, where various media are used for different purposes according to need. Small media, with a rather limited and local reach (such as pamphlets, SMS, niche websites and small-scale meetings) are predominantly used for most of the needs, overshadowing mass media usage. Correlations were found amongst various media usages, and between the usage of various media and users' sense of community. The study demonstrates how contemporary media users use a variety of media depending on their circumstances and needs, and how media usage assists in establishing and maintaining a sense of community after the forced transition from the communities of origin.

Subjects communicated prior to playing trust games; the richness of the communication media and the topics of conversation were manipulated. Communication richness failed to produce significant differences in firstmover investments. However, the topics of conversation made a significant difference: the amounts sent were considerably higher in the unrestricted communication conditions than in the restricted communication and no-communication conditions. Most importantly, we find that first-movers' expectations of second-movers' reciprocation are influenced by communication and strongly predict their levels of investment.

The article analyzes whether Facebook campaigning is consistent with the Normalization or Equalization hypothesis, drawing on data from the election campaigns for the 20th Israeli Parliament in 2015. We looked at six indicators of Facebook activity (number of fans, number of posts, and scope of engagement [likes, comments, shares, and overall engagement]) of all parties running for the Knesset as well as candidates with realistic electability rankings. We found that a comparison between dominant and peripheral parties across all indicators is consistent with the Normalization hypothesis, but when it is framed in terms of expectations and is forward-looking rather than backward-looking, that is, the difference in Facebook performance is between parties that expect to gain a significant number of seats in the parliament, and those that do not anticipate significant parliamentary achievements.