Study participants were three samples of adult volunteers recruited
over the Internet in fall 2002 and winter 2003. Sample 1 (n = 3,907) was
obtained from the Authentic Happiness Website, and Sample 2 (n =
852) and Sample 3 (n = 540) were obtained from the Values in Action
Website. In each sample, respondents on average were 35–40 years of
age; 70% were females, and 80% were U.S. citizens.