Sensitivity to the regularities and structure contained within sequential, goal-directed actions is an important building block for generating expectations about the actions we observe. Until now, research on statistical learning for actions has solely focused on individual action sequences, but many actions in daily life involve multiple actors in various interaction contexts. The current stud...

Conflicts of interest between the community and its members are at the core of human social dilemmas. If observed selfishness has future costs, individuals may hide selfish acts but display altruistic ones, and peers aim at identifying the most selfish persons to avoid them as future social partners. An interaction involving hiding and seeking information may be inevitable. We staged an experim...

Achieving the Millennium Development Goals has proven to be a real challenge. Providing evidence on cost-effective interventions did not prove to be sufficient to secure the trust of national authorities, health care providers and patients. Introducing change in a health system requires a good understanding of the relationships between the actors of the system. Social network analysis can provi...

The concept of social capital, which has gained wide currency in the literature, examines how actors’ ties to others advantage or disadvantage them and the groups to which they belong. Two conceptually distinct types of social capital, closure and brokerage in Burt’s (2005) terms, have been identified. In this paper, we propose a method by which brokerage and closure can be distinguished using ...

Online social media platforms are severely compromised by the existence of malicious actors such as bots on Twitter, vandals on Wikipedia, fake accounts on Facebook, trolls on Twitter and Slashdot, and spammers who seem to be omnipresent. This tutorial presents methods to identify malicious actors in at least 4 settings: Twitter, Facebook, Slashdot, and Wikipedia. We will look at 4 broad catego...

Systems integrations (SI) have been examined from two main vantage points. External B2B SI has focused primarily on transactional interactions between customers and suppliers in the value chain. Internal intra-organizational SI has focused on structural interactions between functional units of the firm. Both approaches present problems for intranet integrations that serve communities of practic...

We evaluated effects of gaze directional and other non-verbal visual cues on multiparty mediated communication. Groups of three participants (two actors, one subject) solved language puzzles in three audiovisual communication conditions. Each condition presented a different selection of images of the actors to subjects: (1) frontal motion video with 14% gaze; (2) motion video with head orientat...

DEFINITION A social network is a social structure made of actors, which are discrete individual, corporate or collective social units like persons or departments [19] that are tied by one or more specific types of relation or interdependency, such as financial exchange, friendship, membership in the same club, sending of messages, web links, disease transmission (epidemiology), or airline route...

Schizophrenia is a mental disorder that is associated with misinterpretation of social signals. This study investigated how individuals with schizophrenia perceive social information differently from mentally healthy individuals in two experiments. In Experiment 1, 28 individual with schizophrenia and 24 healthy controls viewed a series of photos, each varying in emotion, head orientation, and ...