Culture-bound syndrome – Psychiatric and somatic symptoms

Conversion disorder – Diagnostic category used in some psychiatric classification systems

Day-care sex-abuse hysteria – Moral panic and series of prosecutions in North America in the final quarter of the 20th century onwards

Folie à deux – Shared psychosis, a psychiatric syndrome in which symptoms of a delusional belief are transmitted from one individual to another (from the French for "a madness shared by two")

Herd mentality – Human tendency to adopt beliefs and behaviors favored by one's group

Sick building syndrome – Health concern, where people in a building suffer from symptoms of illness or become infected with chronic disease from the building in which they work or reside

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