EVENT-RELATED-POTENTIAL (ERP) REFLECTIONS OF MENTAL RESOURCES - A REVIEW AND SYNTHESIS

In this review studies are evaluated that have utilized middle-latency and late components of the event-related potential (ERP) as indices o f the activation of processing resources. Processing resources are def ined as energetical systems that modulate cognitive processes or data processing systems. An essential element of the resource conceptualiza tion is the idea that processing structures receive not only informati on input but also input from these energetical systems. It is argued f urther that the principal role of these systems is to provide the 'gai n' for the data processing systems. In reviewing these studies special attention is paid to factors affecting the amplitude of ERP component s in single- and dual-task studies, and to the inferences that can be drawn about which particular types of processing resources are reflect ed in these changes in component amplitudes. Finally, a working model is presented relating middle-latency and late ERP components to specif ic perceptual, perceptual-central and central processing resources. (C ) 1997 Elsevier Science B.V.