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Updated 13 February 2015

Cell phones used to measure happiness

Researchers are developing ways to use mobile phones to explore how one’s environment influences one’s sense of well-being.

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In a study involving volunteers who agreed to provide information about their feelings and locations, researchers from Princeton University have found that cell phones can efficiently capture information that is otherwise difficult to record, given today’s on-the-go lifestyle.

This is important, according to the researchers, because feelings recorded “in the moment” are likely to be more accurate than feelings jotted down after the fact.

To conduct the study, the team created an application for the Android operating system that documented each person’s location and periodically sent the question, “How happy are you?”

 The investigators invited people to download the app, and over a three-week period, collected information from 270 volunteers in 13 countries who were asked to rate their happiness on a scale of 0 to 5.

How the research was done

 From the information collected, the researchers created and fine-tuned methods that could lead to a better understanding of how our environments influence emotional well-being. The study was published in Demography.

The mobile phone method could help overcome some of the limitations that come with surveys conducted at people’s homes, according to the researchers. Census measurements tie people to specific areas — the census tracts in which they live — that are usually not the only areas that people actually frequent.

“People spend a significant amount of time outside their census tracks,” said John Palmer, a graduate student in the Woodrow Wilson School of Public and International Affairs and the paper’s lead author. “If we want to get more precise findings of contextual measurements we need to use techniques like this.”

Palmer teamed up with Thomas Espenshade, professor of sociology emeritus, and Frederic Bartumeus, a specialist in movement ecology at the Center for Advanced Studies of Blanes in Spain, along with Princeton’s Chang Chung, a statistical programmer and data archivist in the Office of Population Research; Necati Ozgencil, a former Professional Specialist at Princeton; and Kathleen Li, who earned her undergraduate degree in computer science from Princeton in 2010, to design the free, open source application for the Android platform that would record participants’ locations at various intervals based on either GPS satellites or cellular tower signals.

Though many of the volunteers lived in the United States, some were in Australia, Canada, China, France, Germany, Israel, Japan, Norway, South Korea, Spain, Sweden and the United Kingdom.

Palmer noted that the team’s focus at this stage was not on generalizable conclusions about the link between environment and happiness, but rather on learning more about the mobile phone’s capabilities for data collection.

Men less happy when away from home

“I’d be hesitant to try to extend our substantive findings beyond those people who volunteered.” he said.

However, the team did obtain some preliminary results regarding happiness: for example, male subjects tended to describe themselves as less happy when they were further from their homes, whereas females did not demonstrate a particular trend with regards to emotions and distance.

“One of the limitations of the study is that it is not representative of all people,” Palmer said.

Participants had to have smartphones and be Internet users. It is also possible that people who were happy were more likely to respond to the survey. However, Palmer said, the study demonstrates the potential for mobile phone research to reach groups of people that may be less accessible by paper surveys or interviews.

Palmer’s doctoral dissertation will expand on this research, and his adviser Marta Tienda, the Maurice P. During Professor in Demographic Studies, said she was excited to see how it will impact the academic community. “His applied research promises to redefine how social scientists understand intergroup relations on many levels,” she said.

Image of woman staring at phone from Shutterstock.

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