ABAB could provide the most valid non intervention measure with demonstration of experimental control
ABAB Concept
After returning to the baseline, the intervention is reintroduced in the ABAB design in order to assess its effectiveness and determine whether there is a functional relationship between A and B. The definition of ABAB design includes:
A- Data collection and the baseline period
B. Intervening
A: Discontinue the intervention and return to the baseline
B: Reintroduce the intervention
As the subject of the study grows habituated to the intervention, some interventions may become stronger over time while others may become weaker.
An example of a time-series design is the ABAB design. This means that when using ABAB, researchers can employ the same statistical techniques as when doing a time series analysis.
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