This volume is intended to provide an overview and scholarly analysis of state-of-the-art developments within the field of environmental simulation research. Environmental simulation involves the presentation of scale­ model previews, full-scale mock-ups, and computer images of planned environments and activities taking place within them to designers and to prospective users of those settings. Environmental simulations are under­ taken for many purposes, including (1) the training of environmental de­ sign students and professionals, (2) the assessment of people's environ­ mental preferences, and (3) the incorporation of observers' assessments of simulated settings into the planning, design, and renovation of actual envi­ ronments to maximize the degree of fit between occupants' needs and the arrangement of their physical surroundings. Environmental simulation research has expanded rapidly during the past two decades as the result of increasing collaboration between behav­ ioral and social scientists, environmental designers, and professional plan­ ners. During this period, alternative conceptual and methodological ap­ proaches to environmental simulation have emerged, and numerous programs of simulation research have been initiated worldwide. To date, however, no attempt has been made to present a comprehensive review and assessment of these research developments and an analysis of their implications for design and public policy. Accordingly, the major objectives of this volume are to provide an overview of key conceptual and meth­ odological advances within the field of environmental simulation research and to place these diverse developments within a broader scientific and public policy context.