This paper describes research on the design of behavioral and mental health facilities. Using input from clinical staff, the purpose of the study was four-fold: to develop and test a tool for the evaluation of mental and behavioral health (MBH) facilities, to evaluate the importance and effectiveness of specific environmental qualities and features, to generate design guidelines for MBH facilities, and to make recommendations for future research. A draft version of a tool that was intended to measure the importance and effectiveness of environmental qualities and features in MBH facilities was developed using a multi methods approach. This survey, the Psychiatric Staff Environmental Design (PSED) tool, was distributed to psychiatric nursing organization members (N = 134). The researchers determined that the PSED was suitable for future research with minor modifications. Other findings included staff support for private patient rooms, staff recognition of the critical role of positive distraction, and the importance of aesthetics. (C) 2017 Elsevier Ltd. All rights reserved.