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“The American Psychological Association, in Washington, D.C., is the largest scientific and professional organization representing psychology in the United States…APA works to advance the creation, communication and application of psychological knowledge to benefit society and improve people's lives.”
“The Pew Research Center’s Social & Demographic Trends project studies behaviors and attitudes of Americans in key realms of their lives, including family, community, health, finance, work and leisure” Browse the topics page or search for one in particular. The topics page search bar allows searching of actual survey questions, listed topics, or the entire site.