Abstract
Eye-tracking is a biometrics technique that has started to find applications in research related to our interaction with the built environment. Depending on the focus of a given study, the collection of valence and arousal measurements can also be conducted to acquire emotional, cognitive, and behavioral insights and correlate them with eye-tracking data. These measurements can give architects and designers a basis for data-driven decision-making throughout the design process. In instances involving existing structures, biometric data can also be utilized for post-occupancy analysis. This entry will discuss eye-tracking and eye-tracking simulation in the context of our current understanding of the importance of our interaction with the built environment for both physical and mental well-being.