Abstract
This study found that the use of a computer conferencing system in an R&D lab was significantly shaped by a set of intervening actors—mediators—who actively guided and manipulated the technology and its use over time. These mediators adapted the technology to its initial context and shaped user interaction with it; over time, they continued to modify the technology and influence use patterns to respond to changing circumstances. We argue that well‐managed mediation may be a useful mechanism for shaping technologies to evolving contexts of use, and that it extends our understanding of the powerful role that intervenors can play in helping CSCW applications succeed.