- 1913 – Roger Wolcott Sperry, American neuropsychologist and neurobiologist, Nobel Prize laureate (d. 1994).
- 1985 – Donald O. Hebb, Canadian psychologist and academic (b. 1904).
Roger Wolcott Sperry
Roger Wolcott Sperry (20 August 1913 to 17 April 1994) was an American neuropsychologist, neurobiologist and Nobel laureate who, together with David Hunter Hubel and Torsten Nils Wiesel, won the 1981 Nobel Prize in Physiology and Medicine for his work with split-brain research.
A Review of General Psychology survey, published in 2002, ranked Sperry as the 44th most cited psychologist of the 20th century.
Donald O. Hebb
Donald Olding Hebb FRS (22 July 1904 to 20 August 1985) was a Canadian psychologist who was influential in the area of neuropsychology, where he sought to understand how the function of neurons contributed to psychological processes such as learning.
He is best known for his theory of Hebbian learning, which he introduced in his classic 1949 work The Organisation of Behaviour. He has been described as the father of neuropsychology and neural networks. A Review of General Psychology survey, published in 2002, ranked Hebb as the 19th most cited psychologist of the 20th century. His views on learning described behaviour and thought in terms of brain function, explaining cognitive processes in terms of connections between neuron assemblies.