Which of the following are defined as a phenomenon in which large numbers of people engage in unusual behaviors that appear to have a psychological origin?

A) Psychic catastrophes
B) Psychic epidemics
C) Psychic projections
D) Psychic illusions

Psychic Epidemics

Mass psychological phenomena in which a large number of people exhibit similar mental symptoms or behaviors, often as a result of shared stressors or fears.

Psychological Origin

Refers to the underlying psychological factors or conditions that contribute to the development of behaviors, thoughts, or emotions.