If we suppose a researcher conducts an A-B-A-B study. She records baseline observations and then administers a treatment and records behavior during treatment. Her next step would be administering the treatment again.
Reason Behind the Next Step of the Study
It is given the the researcher conducts an A-B-A-B study.
Her first step was recording the baseline observations.
Hence, first A indicates the first step here that is, recording the observations
In the next step of the study, she administers a treatment.
Thus, B denotes the administering treatment step.
Again, for the third step of the study, she again records behavior during the treatment.
This is again denoted by A.
Hence, we can conclude that in the A-B-A-B study, A denotes recording observation or behavior, B denotes administering a treatment.
Now, since, A, B, and A steps of the study have already been followed, the next phase is B which is concerned with reintroducing or re-administering the treatment.
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