Original sentence: For example, in 1984 Skuse based criticism of a basic tenet of attachment theory on the work of Anna Freud with children from Theresienstadt, who apparently developed relatively normally in spite of serious deprivation during their early years.There has been critical discussion of conclusions drawn from clinical and observational work, and whether or not they actually support tenets of attachment theory.This discussion concluded from Freud's case and from some other studies of extreme deprivation that there is an excellent prognosis for children with this background, unless there are biological or genetic risk factors