The objective of this symposium is to discuss research dealing with the role of complexity in functions and tasks commonly allocated to the operators/users of systems. Systems of greater capability are being designed and the complexity of operation is increasing. Conceptual/experimental approaches to complexity are reviewed under the categories of procedural, cognitive, and conceptual complexity. Specific projects are reviewed on the effects of complexity on memory for procedures, information extraction for displays, and flight operations in the glass cockpit.
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