The American Psychological Association (APA) is a scientific and professional membership association incorporated in the District of Columbia. Founded in 1892, the APA was the world's first national psychological association, and it remains the largest. In 1945, it reorganized to encompass several smaller psychological groups, broadening its mission but retaining the APA name.
The APA's expanded mission included professional as well as scientific issues and a concern for psychology's contributions to the public interest. A multifaceted structure was developed to reflect the diversity of the APA's membership and its expanded mission. These changes, and the growth of membership, also prompted the establishment in 1946 of a central office with an executive officer and staff to provide membership services.
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