• The pattern of behavior in each treatment phase is clearly different from the pattern in each baseline phase. This demonstration is necessary to establish a relationship between the treatment and the behaviour.
• The changes in behavior from baseline to treatment and from treatment to baseline are the same for each of the phase-change points in the experiment. This demonstration is necessary to establish a causal relationship between treatment and behavior. That is, the results demonstrate that the researcher can cause the behavior to turn
on and off simply by starting and stopping the treatment.