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.
Herp was born around 1400 either at Erp near Veghel or Erps-Kwerps near Leuven. He is possibly the same person as Heinricus Erppe, clericus Cameracensis dioceses, who in 1426, as one of the first students, was registered at the University of Leuven.