In spite of the various objects of evaluation and different purposes of research, only a few popular media, e.g., single and successive static picture, are used in people-environment studies. There are many studies which have checked the reliability of the popular simulation media. However, not only the authors but a number of researchers have expressed doubts concerning the reliability of those methods. The authors perceived strange answers and results when using static photos and the evaluation grid method in evaluation experiments. For example, when using static photos, some participants evaluated the environment from specific elements found in those photos. However, the same participants mentioned that they did not notice the elements, which affected their evaluation strongly, ill the actual situation. This means that the results of this kind of experiment might be different from the results in the actual situation. The question is, why did these differences occur? In the present study, the authors, applying ideas from cognitive science, checked the validity ot' sonic simulation methods and found differences in the results of townscape simulation experiments when using different types of simulation media. At the IAPS 15 Conference, taking the above into consideration, the authors will show better combinations among simulation media, object of research. and purpose of evaluation, and make some comments, e.g., the advantage and disadvantage of the simulations for research in people-environment studies.