This paper suggests that scientific methods can be adapted to the problem of evaluating aesthetic effects of environments. It is not, perhaps, clear why a scientific method of evaluating environmental aesthetics is needed. The dominant paradigm in environmental aesthetics is discourse about aesthetic or legal theories, supported by the prestige of authors or institutions, carefully selected examples, and excellent presentations. This paper presents a different method, one that is based on scientific experiments. This scientific paradigm is presented on the hope that it may allow designers or regulators avoid problems that are irreconcilable within the discursive tradition. In order to see if that hope can be justified, the remainder of this paper will present the reasons why a new method for evaluating aesthetic effects is needed, some results from the scientific literature, a brief description of how the proposed method works, and some reflections on possible relations between the scientific and discursive applications.