ABSTRACT
Introduction Diagnoses of disturbances, in complex and dynamic environments such as nuclear
power plants (NPP), is considered to constitute one of the greatest cognitive demands to be experienced by the human operator (Vicente, 1995; Woods et al, 1994). However the operator is not expected to perform unaided. The role of the interface is not only to represent system data in a meaningful and expected format but to support operator diagnosis. Ultimately the interface design should activate or trigger the correct type of knowledge from memory allowing the operator to generate a quick and accurate diagnosis of the disturbance.
