Mohamed Hesham Khalil, Koen Steemers
This paper aims to establish the Neurobiophilia Index, a quantitative tool to assess environmental enrichment at the architectural scale based on neurobiological evidence. Using a literature review followed by an expert opinion workshop and deliberations, 10 items were identified: sky visibility, daylight, light/dark cycles, sound, odours, indoor plants, window green views, temperature, air quality, and materials. The index provides a symmetrical scoring system for each item based on the effect of its parameters on the brain: enrichment (+1), neutral (0), and harm (−1), facilitating assessment of architectural spaces and buildings to understand implications for neuroplasticity, with cognitive, mental health, stress recovery, and resilience outcomes. It is a useful tool for future research and provides a pathway toward advancing green building rating systems from sustainability to neurosustainability.