Ofer Arazy

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Ofer Arazy is an author.

Publications

Only those publications related to wikis are shown here.
Title Keyword(s) Published in Language DateThis property is a special property in this wiki. Abstract R C
A game theoretic analysis of collaboration in Wikipedia Collaboration
Non-cooperative game
Peer production
Trustworthy collaboration
Vandalism
Wikipedia
Lecture Notes in Computer Science English 2013 Peer production projects such as Wikipedia or open-source software development allow volunteers to collectively create knowledge-based products. The inclusive nature of such projects poses difficult challenges for ensuring trustworthiness and combating vandalism. Prior studies in the area deal with descriptive aspects of peer production, failing to capture the idea that while contributors collaborate, they also compete for status in the community and for imposing their views on the product. In this paper, we investigate collaborative authoring in Wikipedia, where contributors append and overwrite previous contributions to a page. We assume that a contributor's goal is to maximize ownership of content sections, such that content owned (i.e. originated) by her survived the most recent revision of the page.We model contributors' interactions to increase their content ownership as a non-cooperative game, where a player's utility is associated with content owned and cost is a function of effort expended. Our results capture several real-life aspects of contributors interactions within peer-production projects. Namely, we show that at the Nash equilibrium there is an inverse relationship between the effort required to make a contribution and the survival of a contributor's content. In other words, majority of the content that survives is necessarily contributed by experts who expend relatively less effort than non-experts. An empirical analysis of Wikipedia articles provides support for our model's predictions. Implications for research and practice are discussed in the context of trustworthy collaboration as well as vandalism. 0 0
Stay on the Wikipedia task: When task-related disagreements slip into personal and procedural conflicts Human factors
Knowledge management
Social psychology
Journal of the American Society for Information Science and Technology English 2013 In Wikipedia, volunteers collaboratively author encyclopedic entries, and therefore managing conflict is a key factor in group success. Behavioral research describes 3 conflict types: task-related, affective, and process. Affective and process conflicts have been consistently found to impede group performance; however, the effect of task conflict is inconsistent. We propose that these inconclusive results are due to underspecification of the task conflict construct, and focus on the transition phase where task-related disagreements escalate into affective and process conflict. We define these transitional phases as distinct constructs - task-affective and task-process conflict - and develop a theoretical model that explains how the various task-related conflict constructs, together with the composition of the wiki editor group, determine the quality of the collaboratively authored wiki article. Our empirical study of 96 Wikipedia articles involved multiple data-collection methods, including analysis of Wikipedia system logs, manual content analysis of articles' discussion pages, and a comprehensive assessment of articles' quality using the Delphi method. Our results show that when group members' disagreements - originally task related - escalate into personal attacks or hinge on procedure, these disagreements impede group performance. Implications for research and practice are discussed. 0 0
Corporate wikis: The effects of owners' motivation and behavior on group members' engagement Knowledge management (KM)
Knowledge management systems (KMS)
Knowledge sharing
Motivation
Owner
Regulatory focus theory
Social cognitive theory
Wiki
Journal of Management Information Systems English 2012 Originally designed as a tool to alleviate bottlenecks associated with knowledge management, the suitability of wikis for corporate settings has been questioned given the inherent tensions between wiki affordances and the realities of organizational life. Drawing on regulatory focus theory and social cognitive theory, we developed and tested a model of the motivational dynamics underlying corporate wikis. We examined leaders (owners) and users of 187 wiki-based projects within a large multinational firm. Our findings revealed two countervailing motivational forces, one oriented toward accomplishment and achievement (promotion focus) and one oriented toward safety and security (prevention focus), that not only predicted owners' participation but also the overall level of engagement within the wiki groups. Our primary contribution is in showing that, notwithstanding the potential benefits to users, wikis can trigger risk-avoidance motives that potentially impede engagement. Practically, our findings call for an alignment between organizational procedures surrounding wiki deployment and the technology's affordances. © 2013 M.E. Sharpe, Inc. All rights reserved. 0 0
What makes corporate wikis work? wiki affordances and their suitability for corporate knowledge work Affordances
Knowledge management
Wiki
Lecture Notes in Computer Science English 2012 Wikis were originally intended for knowledge work in the open Internet environment, and there seems to be an inherent tension between wikis' affordances and the nature knowledge work in organizations. The objective of this paper is to investigate how tailoring wikis to corporate settings would impact users' wiki activity. We begin by synthesizing prior works on wikis' design principles; identifying several areas where we anticipate high tension between wikis' affordances and organizational work practices. We put forward five propositions regarding how changes in corporate wikis deployment procedures may impact users' wiki activity. An empirical study in one multi-national organization tested users' perceptions towards these propositions, revealing that in some cases there may be a need for modifying wiki's design, while in other cases corporations may wish to change their knowledge work practices to align with wikis' affordances. 0 0
Information Quality in Wikipedia: The Effects of Group Composition and Task Conflict Co-authorship
Cognitive diversity
Collaboration
Community-Based Production
Group Composition
Information quality
Task Conflict
Wikipedia
J. Manage. Inf. Syst. English 2011 0 2
Information quality in wikipedia: The effects of group composition and task conflict Co-authorship
Cognitive diversity
Collaboration
Community-based production
Group composition
Information quality
Task conflict
Wikipedia
Journal of Management Information Systems English 2011 The success of Wikipedia demonstrates that self-organizing production communities can produce high-quality information-based products. Research on Wikipedia has proceeded largely atheoretically, focusing on (1) the diversity in members' knowledge bases as a determinant of Wikipedia's content quality, (2) the task-related conflicts that occur during the collaborative authoring process, and (3) the different roles members play in Wikipedia. We develop a theoretical model that explains how these three factors interact to determine the quality of Wikipedia articles. The results from the empirical study of 96 Wikipedia articles suggest that (1) diversity should be encouraged, as the creative abrasion that is generated when cognitively diverse members engage in task-related conflict leads to higher-quality articles, (2) task conflict should be managed, as conflict-notwithstanding its contribution to creative abrasion-can negatively affect group output, and (3) groups should maintain a balance of both administrative- and content-oriented members, as both contribute to the collaborative process. © 2011 M.E. Sharpe, Inc. 0 2
Determinants of Wikipedia quality: the roles of global and local contribution inequality Contribution inequality
Coordination
Global inequality
Information quality
Local inequality
Wikipedia
English 2010 The success of Wikipedia and the relative high quality of its articles seem to contradict conventional wisdom. Recent studies have begun shedding light on the processes contributing to Wikipedia's success, highlighting the role of coordination and contribution inequality. In this study, we expand on these works in two ways. First, we make a distinction between global (Wikipedia-wide) and local (article-specific) inequality and investigate both constructs. Second, we explore both direct and indirect effects of these inequalities, exposing the intricate relationships between global inequality, local inequality, coordination, and article quality. We tested our hypotheses on a sample of a Wikipedia articles using structural equation modeling and found that global inequality exerts significant positive impact on article quality, while the effect of local inequality is indirect and is mediated by coordination 0 1
Recognizing contributions in wikis: Authorship categories, algorithms, and visualizations Algorithms
Author productivity
Editing
Electronic visualization
Wiki
J. Am. Soc. Inf. Sci. Technol. English 2010 0 1
The sustainability of corporate wikis: A time-series analysis of activity patterns Wiki
Clustering
Corporate
Edit activity patterns
Lifecycle
Sustainability
Time series
ACM Trans. Manage. Inf. Syst. English 2010 0 0
The life cycle of corporate wikis:An analysis of activity patterns Activity patterns
Clustering
Corporate
Life cycle
Wiki
19th Workshop on Information Technologies and Systems, WITS 2009 English 2009 Following the success of wikis on the internet (e.g. Wikipedia), corporations have begun adopting wikis. Preliminary evidence suggests that wiki is a sustainable collaboration tool and that wikis deployment is experiencing massive success. The objective of this paper is to provide a large scale evaluation of corporate wikis life cycles. We analyze and categorize the temporal activity patterns of more than thirteen thousand wikis in one multinational organization over a 29 months period. This clustering problem poses some unique challenges, and required the development of novel extensions to existing algorithms. We identified four clusters and their prototypical activity patterns. Our findings show that, contrary to what has been suggested in previous studies, most corporate wikis become inactive after a relatively short period, and less than 20% of wikis show continuous activity. Implications for research and practice are discussed. 0 0
Wiki Deployment in Corporate Settings. IEEE Technology \& Society Magazine 2009 The article explores the deployment of Wikipedia, an online encyclopedia in corporate set up. The authors found that the medium emerged as powerful collaborative technology. They determined in corporate setting it was used for variety of purposes, such as from portals, to project management and knowledge-base creation. They also examined that regularly attract users who are primarily persuaded by making work easier and helping the organization achieve its goals, while social reputation did not seem to a significant motivational aspect. 0 0
Wisdom of the Crowds: Decentralized Knowledge Construction in Wikipedia Wikipedia
Wisdom of the Crowds
Collective intelligence
Information quality
16th Annual Workshop on Information Technologies & Systems (WITS) 2006 Recently, Nature published an article comparing the quality of Wikipedia articles to those of Encyclopedia Britannica (Giles 2005). The article, which gained much public attention, provides evidence for Wikipedia quality, but does not provide an explanation of the underlying source of that quality. Wikipedia, and wikis in general, aggregate information from a large and diverse author-base, where authors are free to modify any article. Building upon Surowiecki's (2005) Wisdom of Crowds, we develop a model of the factors that determine wiki content quality. In an empirical study of Wikipedia, we find strong support for our model. Our results indicate that increasing size and diversity of the author-base improves content quality. We conclude by highlighting implications for system design and suggesting avenues for future research. 0 0
Wisdom of the crowds: Decentralized knowledge construction in Wikipedia 16th Workshop on Information Technologies and Systems, WITS 2006 English 2006 Recently, Nature published an article comparing the quality of Wikipedia articles to those of Encyclopedia Britannica (Giles 2005). The article, which gained much public attention, provides evidence for Wikipedia quality, but does not provide an explanation of the underlying source of that quality. Wikipedia, and wikis in general, aggregate information from a large and diverse author-base, where authors are free to modify any article. Building upon Surowiecki's (2005) Wisdom of Crowds, we develop a model of the factors that determine wiki content quality. In an empirical study of Wikipedia, we find strong support for our model. Our results indicate that increasing size and diversity of the author-base improves content quality. We conclude by highlighting implications for system design and suggesting avenues for future research. 0 0
An analysis of Open Content Systems 15th Workshop on Information Technology and Systems, WITS 2005 English 2005 Traditionally, content in organizational Knowledge Bases is created in a highly centralized manner to ensure quality. In Open Content Systems (OCS), on the other hand, content is generated in a distributed and decentralized manner. The most notable examples of OCS are Slashdot, the technology news portal, and Wikipedia, an online encyclopedia. The advantage of such systems is the speed in which content is accumulated, while the risk of open content systems is the lack of traditional quality control mechanisms. The purpose of this paper is to examine the processes that enable an open content system (OCS) to function effectively. We conduct a survey of existing open content systems, and analyze the interplay between the technology underlying OCS, the user community who is responsible for content generation, and the types of content managed by the OCS systems. Our analysis identifies specific settings where open content systems are likely to thrive. 0 0