“…Although supervisory staff remained very constant this was not so for the child-care students or recently graduated workers who had the greatest contact with the children; thirdly, these units were designed for the treatment of pre-adolescents. Children who were older at admission would therefore be more likely to be discharged before treatment was completed, due to the onset of adolescence and treatment needs which could no-longer be met; fourthly, considerable fluctuation in ratings may take place in the early months of admission (4). Therefore real differences in admission ratings might be masked if the Nineteen pairs of subjects met these criteria, and matching was very close.…”