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the american psychological association (apa) is a scientific and professional organization that represents psychologists in the united states. apa educates the public about psychology, behavioral science and mental health; promotes psychological science and practice; fosters the education and training of psychological scientists, practitioners and educators; advocates for psychological knowledge and practice to inform public policy; and champions the application of psychology to promote human rights, health, well-being and dignity.
the american medical association, founded in 1847 and incorporated in 1897, is the largest association of physicians—both mds and dos—and medical students in the united states. the ama's mission is "to promote the art and science of medicine and the betterment of public health."