Rick Wash

Motivations to participate in online communities

A consistent theoretical and practical challenge in the design of socio-technical systems is that of motivating users to participate in and contribute to them. This study examines the case of Everything2.com users from the theoretical perspectives of Uses and Gratifications and Organizational Commitment to compare individual versus organizational motivations in user participation. We find evidence that users may continue to participate in a site for different reasons than those that led them to the site. Feelings of belonging to a site are important for both anonymous and registered users across different types of uses. Long-term users felt more dissatisfied with the site than anonymous users. Social and cognitive factors seem to be more important than issues of usability in predicting contribution to the site.

Student use of Facebook for organizing collaborative classroom activities

Social network sites such as Facebook are often conceived of as purely social spaces; however, as these sites have evolved, so have the ways in which students are using them. In this study, we examine how undergraduate students use the social network site Facebook to engage in classroom-related collaborative activities (e.g., arranging study groups, learning about course processes) to show how Facebook may be used as an informal tool that students use to organize their classroom experiences, and explore the factors that predict type of use. Data from two surveys (N = 302, N = 214) are used to analyze how Facebook use, social and psychological factors, self-efficacy, and types of instructor-student communication on Facebook are related to positive and negative collaboration among students. We found that predictors of Facebook use for class organizing behaviors include self-efficacy and perceived motivation to communicate with others using the site. When placed in the context of social and psychological factors, Facebook intensity did not predict either positive or negative collaboration, suggesting that how students used the site, rather than how often they used the tool or how important they felt it was, affected their propensity to collaborate.

Stories as informal lessons about security

Non-expert computer users regularly need to make security-relevant decisions; however, these decisions tend not to be particularly good or sophisticated. Nevertheless, their choices are not random. Where does the information come from that these non-experts base their decisions upon? We argue that much of this information comes from stories they hear from other people. We conducted a survey to ask open- and closed- ended questions about security stories people hear from others. We found that most people have learned lessons from stories about security incidents informally from family and friends. These stories impact the way people think about security, and their subsequent behavior when making security-relevant decisions. In addition, many people retell these stories to others, indicating that a single story has the potential to influence multiple people. Understanding how non-experts learn from stories, and what kinds of stories they learn from, can help us figure out new methods for helping these people make better security decisions.

Design decisions in the RideNow project

The RideNow Project is designed to help individuals within a group or organization coordinate ad hoc shared rides. This paper describes three design decisions the RideNow team made in order to allow incremental adoption and evolution and to capitalize on local conditions. (1) The system allows users to interact with the system through email or Web, because we anticipate that email will be most convenient when there are few users but the Web interface will be more useful as the number of users increase. (2) The system does not force structure on user-entered data such as dates, times, and locations, instead allowing conventions to emerge. (3) We use the groups shared physical spaces to provide additional information about ride sharing activity.

Public bookmarks and private benefits: An analysis of incentives in social computing

Users of social computing websites are both producers and consumers of the information found on the site. This creates a novel problem for web-based software applications: how can website designers induce users to produce information that is useful for others? We study this question by interviewing users of the social bookmarking website del.icio.us. We find that for the users in our sample, metadata reflecting who bookmarked a webpage better supports information seeking than free-form keyword metadata (tags). We explain this finding by describing differences in the way that the design of del.icio.us motivates users to contribute by providing personal benefits for bookmarking and tagging.

Latent Users in an Online User-Generated Content Community

Online communities depend on the persistent contributions of heterogeneous users with diverse motivations and ways of participating. As these online communities exist over time, it is possible that users change the way in which they contribute to the site. Through interviews with 31 long-term members of a user-generated content community who have decreased their participation on the site, we examined the meaning that these users gave to their contribution and how their new participation patterns related to their initial motivations. We complement the reader-to-leader framework (Preece and Shneiderman: AIS Transactions on Human-Computer Interaction, vol. 1, no. 1, pp. 13–32, 2009) by propounding the concept of latent user to understand decreasing content contribution and user life-cycles in online communities. We showed that even though latent users decrease their content contribution, their participation becomes more selective and remained consistent with initial motivations to participate.

Don't Wait!: How Timing Affects Coordination of Crowdfunding Donations

Crowdfunding sites often impose deadlines for projects to receive their requested funds. This deadline structure creates a difficult decision for potential donors. Donors can donate early to a project to help it reach its goal and to signal to other donors that the project is worthwhile. But donors may also want to wait for a similar signal from others. We conduct an experimental simulation of a crowdfunding website to explore how potential donors to projects make this decision. We find evidence for both strategies in our experiment; some donate early while others wait till the last second. However, we also find that making an early donation is usually a better strategy for donors because the amount of donations made early in a projects campaign is often the only difference between that project being funded or not. This finding suggests that crowdfunding sites need to develop designs, policies and incentives that encourage people to make immediate donations so that the site can most efficiently fund projects.

Identifying patterns in informal sources of security information

Computer users have access to computer security information from many different sources, but few people receive explicit computer security training. Despite this lack of formal education, users regularly make many important security decisions, such as “Should I click on this potentially shady link?” or “Should I enter my password into this form?” For these decisions, much knowledge comes from incidental and informal learning. To better understand differences in the security-related information available to users for such learning, we compared three informal sources of computer security information: news articles, web pages containing computer security advice, and stories about the experiences of friends and family. Using a Latent Dirichlet Allocation topic model, we found that security information from peers usually focuses on who conducts attacks, information containing expertise focuses instead on how attacks are conducted, and information from the news focuses on the consequences of attacks. These differences may prevent users from understanding the persistence and frequency of seemingly mundane threats (viruses, phishing), or from associating protective measures with the generalized threats the users are concerned about (hackers). Our findings highlight the potential for sources of informal security education to create patterns in user knowledge that affect their ability to make good security decisions.

Bootstrapping wikis: developing critical mass in a fledgling community by seeding content

Online communities depend on content contributed by their members. However, new communities have not yet achieved critical mass and are vulnerable to inadequate contribution. To encourage contribution, many fledgling communities seed the site with data from 3rd parties. We study the effectiveness of such seeding by looking at how people react to different types of seeded content. We found that people make larger contributions when there is no seeded content. But when there is seeded content, users learn from that content and contribute similar types of content. Therefore, if websites prefer specific types of contributions, seeding that type of contribution can be a valuable way to elicit appropriate contributions.

Crowdfunding: an emerging field of research

Crowdfunding, the request of resources through social media, has generated much discussion in the popular press; however, there have been few systematic empirical studies of this growing phenomenon. We bring together the leading HCI researchers in crowdfunding and crowdsourcing to discuss this potentially transformative socio-technical innovation that may advance (or harm) human capabilities to innovate and collaborate. We will discuss current empirical research on crowdfunding and the future of research in this field from diverse perspectives including computer science, social science, communications, and design, using both qualitative and quantitative research methods. To make real progress towards realizing future research, we will lead a discussion with the audience of new research agendas in crowdfunding.