1. Introduction
In today's knowledge-driven economy, the competitive necessity of managing knowledge assets has prompted many firms to implement information technology-based knowledge repositories (KRs) to capture, store and disseminate relevant knowledge throughout the organization. However, though a KR offers many potential enhancements to knowledge management processes, its value ultimately depends on whether it contains knowledge that is accurate and valuable to the individuals who use it [53], [42]. Getting high quality knowledge into the KR requires two steps: First, knowledge must be contributed, a task usually performed by members of the community that utilize it as a knowledge source [15], [51]. Second, the contributed knowledge must be validated to ensure its accuracy, as a KR that contains incomplete, specious, or flawed information offers little value and will quickly be abandoned [48].