On the utility of P3 amplitude as a measure of processing capacity.

Focuses on the utility of the amplitude of P3 as a measure of processing capacity and mental workload. Outline of the conceptual framework underlying the relationship between P3 amplitude and task demands and the cognitive task manipulations that determine demands on capacity; Influence of P3 amplitude in reflecting activation of elements in an event-categorization network that is controlled by the joint operation of attention and working memory.