John M. Darley

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John M. Darley
John McConnon Darley

(1938-04-03)April 3, 1938
DiedAugust 31, 2018(2018-08-31) (aged 80)
Alma materSwarthmore College
Harvard University
Known forResearch on the bystander effect
AwardsFellow of the American Academy of Arts and Sciences since 2005, Distinguished Science Award from Society of Experimental Social Psychology (1997)
Scientific career
Public affairs
InstitutionsPrinceton University
ThesisFear and Social Comparison as Determinants of Conformity Behavior (1965)
Doctoral advisorDavid Marlowe
Doctoral studentsMichael Norton

John M. Darley (April 3, 1938 – August 31, 2018) was an American social psychologist who was professor of psychology and public affairs at Princeton University.[2] He was the son of noted professor of psychology, John G. Darley (1910–1990).[3] He has a Ph.D. from Harvard University in Social Relations.[4][5]

Darley is best known, in collaboration with Bibb Latané, for theories which explore why people do not always intervene (i.e. offer aid) at the scene of an emergency, a research interest largely stemming from the tragic case of Kitty Genovese, the New Yorker who was murdered in a New York suburb in March 1964 in the presence of 38 witnesses.[6]


  1. ^ "John McConnon Darley". Dean of the Faculty. Princeton University. Retrieved 13 June 2017.
  2. ^ "Bio". Retrieved 2017-12-24.
  3. ^ "Darley, John G. (1910–1990)". Retrieved 2017-12-24.
  4. ^ Social Psychology: Help and Review. "John Darley: Biography & Theories". Retrieved 2017-12-24.
  5. ^
  6. ^ Latané, B., & Darley, J. M. (1970). The unresponsive bystander: Why doesn't he help? New York: Appleton-Century-Croft