Obesity levels have increased dramatically over the past three decades. The increased prevalence of obesity is likely due in part to changes in the built environment, which have contributed to inadequate physical activity levels and poor diet.
This study aims to examine the role of the built and social environment on physical activity behavior using novel data and methodology. In particular, this study will refine and test methodology to capture survey data on mobile phones where surveys are triggered based on a sensor (e.g., GPS, accelerometer data). Surveys will be automatically triggered under two conditions 1) when a respondent enters an area of interest, such as a park and 2) when the participant changes locations (data akin to a travel diary). The surveys will be designed to provide data that will be useful for agent-based models of walking behavior in both children and adults.