ABSTRACT
The representation effect means that we should think of computer-based artifacts in terms of how they represent the underlying process for some observer in some goal and task context. The impact of computer-based systems on cognition and collaboration is important because it influences how practitioners behave in various situations that can arise in that field of activity. The virtuality of computer-based information technology allows designers to develop new subsystems or devices with the appearance of simplicity by integrating diverse data, capabilities, and devices into a single multi-function visual display unit display and interface. Characteristics of devices shape cognition and collaboration depending on the context of activities, demands, and goals in the particular field of activity. The Impact Flow Diagram shows how the clumsy use of technological possibilities shapes the cognition and behavior of the people embedded in the operational system in predictable ways.
