stress theory definition by hans selye
General Adaptation Syndrome. Selye defined stress as: âStress is the nonspecific response of the body to any demand, whether it is caused by, or results in, pleasant or unpleasant conditions.â. Selye identified three stages of adaptation which a person goes through in his General Adaptation Syndrome in 1936.ans Selye is often considered one of the early pioneers of modern stress theory.