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The design of complex social systems, such as online communities, requires the consideration of many parameters, a practice at odds with social science research that focuses on the effects of a small set of variables. In this article, we show how synthesizing insights from multiple, narrowly focused social science theories in an agent-based model helps us understand factors that lead to the success of online communities. The agent-based model combines insights from theories related to collective effort, information overload, social identity, and interpersonal attraction to predict motivations for online community participation. We conducted virtual experiments to develop hypotheses around three design decisions about how to orchestrate an online community—topical breadth, message volume, and discussion moderation—and the trade-offs involved in making these decisions. The simulation experiments suggest that broad topics and high message volume can lead to higher member commitment. Personalized moderation outperforms other types of moderation in increasing members' commitment and contribution, especially in topically broad communities and those with high message volume. In comparison, community-level moderation increases commitment but not contribution, and only in topically narrow communities. These simulation results suggest a critical trade-off between informational and relational benefits. This research illustrates that there are many interactions among the design decisions that are important to consider; the particulars of the community's goals often determine the effectiveness of some decisions. It also demonstrates the value of agent-based modeling in synthesizing simple social science theories to describe and prescribe behaviors in a complex system, generating novel insights that inform the design of online communities. [ABSTRACT FROM PUBLISHER]

Junk e-mail or spam is rapidly choking off e-mail as a reliable and efficient means of communication over the Internet. Although the demand for human attention increases rapidly with the volume of information and communication, the supply of attention hardly changes. Markets are a social institution for efficiently allocating supply and demand of scarce resources. Charging a price for sending messages may help discipline senders from demanding more attention than they are willing to pay for. Price may also credibly inform recipients about the value of a message to the sender before they read it. This article examines economic approaches to the problem of spam and the results of two laboratory experiments to explore the consequences of a pricing system for electronic mail. Charging postage for e-mail causes senders to be more selective and to send fewer messages. However, recipients did not interpret the postage paid by senders as a signal of the importance of the messages. These results suggest that markets for attention have the potential for addressing the problem of spam but their design needs further development and testing. [ABSTRACT FROM AUTHOR]

In this article we consider the ways in which visual information is used as a conversational resource in the accomplishment of collaborative physical tasks. We focus on the role of visual information in maintaining task awareness and in achieving mutual understanding in conversation. We first describe the theoretical framework we use to analyze the role of visual information in physical collaboration. Then, we present two experiments that vary the amount and quality of the visual information available to participants during a collaborative bicycle repair task. We examine the effects of this visual information on performance and on conversational strategies. We conclude with a general discussion of how situational awareness and conversational grounding are achieved in collaborative tasks and with some design considerations for systems to support remote collaborative repair. [ABSTRACT FROM AUTHOR]

Despite advances in technology, nearly everyone experiences technical challenges using home computers and the Internet. In a field trial of household Internet usage, 89% of 93 families needed support from a computer help desk in the 1st year they used the Internet. However, usually only the most technically involved members of the family requested external technical support, and this behavior was associated with other computer-related behaviors in the household. We explore the process by which a family member with comparatively high technical skill or enthusiasm, often a teenager, becomes the family guru, makes external support requests, and becomes the person in the family to whom others turn for technical help. The family guru benefits from this role, influences the household's adoption of technology, and represents an important link between households and computer support professionals. The role also is a fascinating example of the evolution of intergeneration relationships. [ABSTRACT FROM AUTHOR]

Examines the effects of different communication modalities on the execution and outcome of specific components collaborative writing. Demonstration of expressiveness and interactivity using face-to-face meeting; Limitation in expressing text annotation; Management of the task with greater ease and better results.

Examines the relationship and task in scientific research collaboration. Framework for research collaboration to aid collaborative work; Bases of the framework on semistructured interviews with researchers in psychology, management science, and computer science; Emphasis of the framework on problems in personal relationship and task completion.