"In their study, Kahneman and Killingsworth surveyed 33,391 adults aged between 18 and 65 who live in the United States, are employed and report a household income of least $10,000 a year. The authors said they lacked substantial data for those earning over $500,000.
To measure their happiness, participants were asked to report on their feelings at random intervals in the day via a smartphone app developed by Killingsworth called Track Your Happiness. Killingsworth said in an email that the data came from “repeatedly pinging people at randomly-timed moments during daily life, and asking about their happiness at that moment in real-time.” Specifically, they were asked “How do you feel right now?” on a scale ranging from “very bad” to “very good,” he said."
https://www.washingtonpost.com/business/2023/03/08/money-wealth-happiness-study/
Original study:
https://www.pnas.org/doi/10.1073/pnas.1011492107
To measure their happiness, participants were asked to report on their feelings at random intervals in the day via a smartphone app developed by Killingsworth called Track Your Happiness. Killingsworth said in an email that the data came from “repeatedly pinging people at randomly-timed moments during daily life, and asking about their happiness at that moment in real-time.” Specifically, they were asked “How do you feel right now?” on a scale ranging from “very bad” to “very good,” he said."
https://www.washingtonpost.com/business/2023/03/08/money-wealth-happiness-study/
Original study:
https://www.pnas.org/doi/10.1073/pnas.1011492107