In the late 19th century, two French psychiatrists coined the term “folie à deux,” literally translated as madness for two, to describe what is now widely referred to as shared psychotic disorder, or when two — or more — people transmit delusional beliefs and occasional hallucinations to one another. The condition is most common in people closely related, who live in intimate proximity, and has been lengthily dissected by academics. There is no defined cause for the condition, but factors such as stress and social isolation are believed to be the most common triggers.
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In Agnieszka Smoczynska
’s English language debut, “The Silent Twins
,” sisters June (Letitia Wright
) and Jenniffer Gibbons (Tamara Lawrance
) appear to suffer not so much from folie à deux but one of its most common variants, folie imposée, where one dominant person initially imposes their delusional beliefs upon another,