Between 1838 and 1840, the American Anti-Slavery Society split in three, in part over the issue of women's leadership, specifically Abby Kelley's appointment to the business committee. Radical abolitionists and women's rights supporters, known as Garrisonian abolitionists, remained in the American Anti-Slavery Society.
In 1964, research by Grey Walter and colleagues began the modern era of ERP component discoveries when they reported the first cognitive ERP component, called the contingent negative variation (CNV). Sutton, Braren, and Zubin (1965) made another advancement with the discovery of the P3 component.
APCActive was developed in response to the implementation of the Medicare outpatient prospective payment system (OPPS). The Omnibus Budget Reconciliation Act (OBRA) of 1986 called for the development of a prospective payment system for outpatient care. The OPPS developed by CMS is the outpatient equivalent of the inpatient DRG-based PPS.