The Organization of Behavior

The Organization of Behavior is a 1949 book by psychologist Donald Hebb in which he first introduces his theory about the neural bases of learning, which is now commonly known as "Hebb's postulate."

Hebbian learning
Hebb's postulate proposes that whenever conditioned reflexes are established in an organism through learning, a new anatomical substratum is established in the brain through a physiological process in which weak or non-existent synapses are strengthened by biochemical modification or by permanent changes in their electrical properties. Learning, according to Hebb's hypothesis, is not simply something impressive upon a passive brain, but a process in which the cellular structure of the brain is permanently modified. Richard Webster comments that Hebb's hypothesis has classic status within science, and that it is supported by recent research.