Britannica
Britannica entry on deindividuation, a reference work rather than a study. It credits the term to Leon Festinger in the 1950s, describes its development by Philip Zimbardo and its link to reduced objective self-awareness by Ed Diener, reports the Halloween field study and a 1979 experiment comparing a nurse uniform with a hooded outfit, and summarises the later argument by Reicher, Spears and Postmes that anonymity strengthens adherence to salient group norms.
Britannica entry on deindividuation, a reference work rather than a study. It credits the term to Leon Festinger in the 1950s, describes its development by Philip Zimbardo and its link to reduced objective self-awareness by Ed Diener, reports the Halloween field study and a 1979 experiment comparing a nurse uniform with a hooded outfit, and summarises the later argument by Reicher, Spears and Postmes that anonymity strengthens adherence to salient group norms.
Written from the secondary report.
What our sources record
Recorded when this source was checked, figures included, with page references and quotation marks removed.
Deindividuation. https://www.britannica.com/topic/deindividuation