As immersive virtual environment (VE) applications become more complex, it is clear that we
need a firm understanding of the principles of VE interaction. In particular, designers need
guidance in choosing three-dimensional interaction techniques. In this paper, we present a
systematic approach, testbed evaluation, for the assessment of interaction techniques for
VEs. Testbed evaluation uses formal frameworks and formal experiments with multiple
independent and dependent variables in order to obtain a wide range of performance data …

As immersive virtual environment (VE) applications become more complex, it is clear that we
need a rm understanding of the principles of VE interaction. In particular, designers need
guidance in choosing three-dimensional interaction techniques. In this paper, we present a
systematic approach, testbed evaluation, for the assessment of interaction techniques for
VEs. Testbed evaluation uses formal frameworks and formal experiments with multiple
independent and dependent variables to obtain a wide range of performance data for VE …