was first theorised by Paul Abely in 1927 as a potential symptom of Schizophrenia where an individual will look at themselves in a reflective surface for a prolonged period of time.

MIRROR SIGN: "Patients diagnosed with Schizophrenia were thought to display the mirror sign regularly by sitting in front of a reflective surface and staring into it."
Cite this page: N., Pam M.S., "MIRROR SIGN," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/mirror-sign/ (accessed July 15, 2020).