1713 — Denis Diderot was born. Diderot was a French empiricist and promoter of the scientific method. His Encyclopedie, one of the great works of the Enlightenment, contained an entry on psychology that disseminated the idea among educated people that behavior could be scientifically studied.
1968 — The organizational meeting of Cheiron, the International Society for the History of the Behavioral and Social Sciences, was held in New York, at New York University. The word Cheiron was not part of the original name, but was added within the first year.
1977 — The APA purchased a 46,000 sq ft (4,300 sq m) office building at 1400 North Uhle Street, Arlington, Virginia, for slightly more than $2 million to house its publications, communications, and business affairs staff.
1978 — The first annual meeting of the National Hospice Organization was held in Washington, DC. The organization promotes home care services, including psychological counseling, to terminally ill persons and their families.
1992 — The first International Congress on Behaviorism and the Sciences of Behavior convened in Guadalajara. Fred S. Keller and William N. Schoenfeld were honorary presidents of the meeting.
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