This chapter explains the experimental design and the results of our first experiment, the design of the simulated environments used in that experiment, and a variety of technical details about the equipment we used in addition to what we measured. The use of a simulated environment to create an experimental test bed where a number of variables can be easily manipulated is an appealing idea for the exploration of certain hard-to-test behavioral and experiential phenomena. For several reasons, the study of such experiences without the use of simulation would be unfeasible or too expensive. For example, testing subjects on Earth, rather than sending them into space, is more affordable and also provides a degree of control over a number of important aspects. As will be illustrated, however, the use of simulation (instead of real space flight) also comes with certain limitations.