What could be done to clarify the differentiation in the frequency of aggression among the environments shown in this graph?

Which schedule of reinforcement is most effective at maintaining behaviors?

Three boys with autism, ages 7-10 years old, served as participants in a study.
During baseline, staff used response blocking when five instances of aggression or head-banging occurred within 10 seconds, until attempts ceased for 1 minute.
During baseline and treatment, each occurrence of aggression and head-banging was recorded daily and converted to the number of responses per hour.
Treatment comprised a differential reinforcement of incompatible behavior (DRI) schedule coupled with response blocking after every head-banging or aggression.
The staff initially applied the treatment to head-banging, while continuing to take a baseline on aggression.
After noting treatment effects on head-banging, the staff then applied the treatment to aggression.
In this scenario, how was direct replication shown?

An extinction procedure involves:

A parent reports that her 2-year-old daughter uses a number of stalling techniques to avoid bedtime once she is told to go to bed. What would be a good progress measure for going to bed when told?