Roslyn Lindheim was a social scientist and architect who developed the Planetree model for patient-centered hospital design based on social science research findings. The Planetree model emphasizes connecting patients to social relationships, nature, culture, and the human life cycle. The first Planetree hospital restructured a nursing unit to give patients more control and a less hierarchical environment through design changes like an open nursing station and overnight family areas. The goal was to personalize the environment and make patients feel more at home.