Mobile devices are opening unprecedented opportunities to conduct various social science studies in unobtrusive, large-scale, and longitudinal fashions. Rich dataset captured by smartphones such as communication records, application use patterns and physical sensory readings, serve as basis to understand behavior of human being in depth. Also, crowdsourcing platforms and open-data policy of organizations are enabling scalable data collection and access to such data. Moreover, mobile devices can be used as gateways for real-time intervention and feedback. Such powerful capabilities can enable larger-scale and timely social studies in a cost-effective way beyond traditional study methods such as self-reports, interviews, surveys, and observations under laboratory settings, etc. Many exploratory works have proven that mobile phones are a promising computational platform upon which we plan, develop, and conduct various experimental studies related to social science disciplines.