As a child he showed great interest in animals, and his mother, Maggie Lashley, encouraged his intellectual pursuits. He entered the University of West Virginia at the age of fifteen, and signed up for the zoology class under the famous neurologistJohn Black Johnston. At that time, Lashley decided to pursue a career in zoology. At the same time, Lashley became associated with the psychiatrist Adolf Meyerand psychologist John B.
See Article History Alternative Titles: While working toward a Ph. During three years of postdoctoral work on vertebrate behaviour —17Lashley began formulating the research program that was to occupy the remainder of his life.
He cooperated with Watson on studies of animal behaviour and also gained the skills in surgery and microscopic tissue study needed for investigating the neural basis of learning.
In he became an assistant professor of psychology at the University of Minnesotawhere his prolific research on brain function gained him a professorship in His monograph Brain Mechanisms and Intelligence contained two significant principles: Mass action postulates that certain types of learning are mediated by the cerebral cortex the convoluted outer layer of the cerebrum as a whole, contrary to the view that every psychological function is localized at a specific place on the cortex.
Equipotentiality, associated chiefly with sensory systems such as vision, relates to the finding that some parts of a system take over the functions of other parts that have been damaged. His work included research on brain mechanisms related to sense receptors and on the cortical basis of motor activities.
He studied many animals, including primates, but his major work was done on the measurement of behaviour before and after specific, carefully quantified, induced brain damage in rats. Learn More in these related Britannica articles:Karl S.
Lashley (–), born in Davis, West Virginia, was an American psychologist and behaviorist well-remembered for his influential contributions to the study of learning and memory. His failure to find a single biological locus of memory (or " engram ", as he called it) suggested to him that memories were not localized to one part of the brain, but were widely distributed throughout the cortex.
Karl Lashley, in full Karl Spencer Lashley, also called Karl S.
Lashley, (born June 7, , Davis, West Virginia, U.S.—died August 7, , Paris, France), American psychologist who conducted quantitative investigations of the relation between brain mass and learning ability. Karl Spencer Lashley () Donald A. Dewsbury. Donald A. Dewsbury is Professor emeritus of Psychology at the University of Florida.
He worked as a comparative psychologist and is also an expert on the history of Psychology. He has served as President of the Animal Behavior Society and three American Psychological . Karl Lashley () Noted for: The search for the “engram”; representation and processing in the mammalian cerebral cortex; localization and mass action in the brain; the problem of .
KARL SPENCER LASHLEY]une y, August 7, BY FRANK A. BEACH Eminent psychologist with no earned degree in psychology Famous theorist who specialized in disproving theories. Lashley’s insights were in line with modern theories used by connectionists: theories of artificial intelligence, cognitive science, neuroscience, psychology, and philosophy of mind.
Publications Lashley, Karl S.