In the given case of Amelia's daughter, the design amelia employ is Across behaviors multiple-baseline design.
Multiple-baseline design is an experimental technique where two or more behaviors are evaluated to identify their original, stable expression, and then a treatment or manipulation is administered to one of the behaviors while the others are left unchanged.
Under the multiple-baseline across-settings approach, the withdrawal of interventions may not be necessary; instead, the therapy is transferred to a different subject to assess its effectiveness.
Learn more about multiple-baseline design, here:
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