Despite the increasing popularity and successful examples of crowdsourcing, it is stripped of aureole when collective efforts are derailed or severely hindered by elaborate sabotage. A service exchange dilemma arises when non-cooperation among selfinterested users, and zero social welfare is obtained at myopic equilibrium. Traditional rating protocols are not effective to overcome the inefficie...

In recent years, the Web has evolved into an exchange platform. Customer relationship management must follow this evolution and provide users with tools to integrate data from social networks in order to place companies at the heart of the exchanges. We propose in this paper a generic approach to community detection of customers of a company based on their explicit and implicit behavior, integr...

few, if any, studies have investigated the effect of professional experience as a rater variable and type of assessment as a task variable on raters’ criteria in the assessment of speech acts. this study aimed to explore the impact of nonnative teachers’ professional experience on the use of criteria in monologic and dialogic assessment of 12 role-plays of 3 apology speech acts. to this end, 60...

Online Social Network (OSN) has become the most popular platform on the Internet that can provide an interesting and creative ways to communicate, sharing and meets with peoples. As OSNs mature, issues regarding proper use of OSNs are also growing. In this research, the challenges of online social networks have been investigated. The current issues in some of the Social Network Sites are being ...

Online Social Network (OSN) has become the most popular platform on the Internet that can provide an interesting and creative ways to communicate, sharing and meets with peoples. As OSNs mature, issues regarding proper use of OSNs are also growing. In this research, the challenges of online social networks have been investigated. The current issues in some of the Social Network Sites are being ...

this article deals with social support and its importance in the well being of chronic mental patients and their families. stuctural and functional characteristics of scial network, and their effects on adjustment of chronic mental patients are reviewed. it emphasizes, interventions in social network of chronic mental patients to increase social support and strengthen social networks.

Couples in which the woman is more verbally disinhibited than the man (man-more-inhibited couples) report lower satisfaction than couples in which the man is more verbally disinhibited (woman-more-inhibited couples). A violation of traditional gender roles is hypothesized to underlie this phenomenon. It was predicted that members of man-more-inhibited couples would be rated less likeable than w...

AutoTutor's effectiveness as a tutor and conversational partner was assessed during three development cycles of the system. In Cycle 1 AutoTutor interacted with virtual students, whereas in Cycles 2 and 3, AutoTutor interacted with human students. The tutoring transcripts for the three cycles were analyzed by two sets of knowledgeable judges. One set of judges rated the pedagogical quality of e...

OBJECTIVES Racial differences in self-rated health at older ages are well documented. African Americans consistently report poorer health, even when education, income, and other health status indicators are controlled. The extent to which neighborhood-level characteristics mediate this association remains largely unexplored. We ask whether neighborhood social and economic resources help to expl...