Developed the theory in the 1940s.
Created the first set of diagnostic criteria for ASD.
Observed a lack of warmth from parents of children with ASD.
Described children with ASD as being brought up in emotional refrigerators - cold, distant, overly intellectual parents.
Focused on mothers who he said had just happened to defrost long enough to produce a child.
Origins of theory lie in psychodynamic approach - childhood experience.