In neuroscience a number of new techniques have been developed by means of which it has become possible to study the activity of the living human brain. By means of these techniques we are beginning to understand the neurophysiology behind environmental attitudes and preferences. In addition to an introduction to cognitive neuroscience, this invited symposium contains a number of presentations, where brain wave analysis has been employed in Environmental Psychology. The program includes: The impact of interior colours on brain waves (B. Mikellides); Biological diversity, attitudes, and brain waves (M. Johansson); The use of fractals and EEG in landscape analysis (C. Hägerhäll); How does the brain respond to everyday objects? (R. Küller). The discussion: Neuroscience as a basis for Environmental Psychology, is introduced and lead by G. W. Evans.