Mobility, Activity, and Social Interactions Study

MOASIS Mobility, Activity, and Social Interactions Study

Velux Stiftung (project no. 917), affiliated researcher


How we maintain our health in older age in everyday life becomes increasingly important as the proportion of elderly people rises. Physical activity, real-world space use, and a stimulating environment are predictors for maintaining good physical and mental health.

Moasis study

The Mobility, Activity and Social Interaction Study (MOASIS) collects individualized everyday-life health data in older adults by measuring movement trajectories, physical and social activities of older adults. MOASIS ultimately aims to develop computational models to measure, analyze, and improve health behaviors and health outcomes in the everyday life of aging individuals.

Figure: uTrail yellow

Figure: uTrail yellow

In order to provide access to real-life health outcome measurement tools, the study aims to detect and model intraindividual changes and interindividual differences in movement trajectories and social activities of older adults, indexed by repeated measures of movement, space use and social context parameters.

MOASIS is conducted in cooperation between the URPP “Dynamics of Healthy Aging” and the Department of Geography, University of Zurich.


The small mobile sensor uTrail is used for the data collection, assuming no prior technical knowledge by the participants. uTrail (see Figure), a tracker specifically developed for this study, measures the mobility (spatial activity) with GPS, physical activity with a 3-axis accelerometer and social interaction with a microphone using the electronically activated recorder (EAR) method.