• The Hawthorne effect is when the subjects of an experimental study try to change or improve their behavior simply because it is being evaluated or studied.

  • The term was coined during experiments that were carried out at the Western Electric plant in the Chicago suburb of Hawthorne in the late 1920s and early 1930s.
  • It is believed that the Hawthorne effect is inevitable in studies and experiments in which humans are used as test subjects.
  • The question of whether the Hawthorne effect is real remains open.