Refrigerator mother theory
The refrigerator mother theory, also known as Bettelheim's theory of autism, is a discredited psychological theory that the cause of autism is a lack of parental, and in particular, maternal emotional warmth. Evidence against the refrigerator mother theory began in the late 1970s, with twin studies suggesting a genetic etiology, as well as non-social environmental factors.
Source: Wikipedia — Refrigerator mother theory (CC BY-SA 4.0)