ABSTRACT
In this chapter, challenges to human performance measurement in general are briefly described and potential advantages and disadvantages unique to performance measurement in virtual environments (VE) are identified. Next, basic issues concerning the why, what, and how of VE performance measurement are discussed and then integrated into recommendations for when to perform various aspects of performance measurement. Emphasis is placed on psychophysiological measures because of their potential to provide a valuable complement to other measures of performance in virtual environments. Finally, properties of measurements as they relate to psychometric criteria and data integrity are presented.
