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Results

#1. A researcher is evaluating the efficacy of a new behavioral intervention. The study design involves an initial phase where the target behavior is measured without any intervention (baseline condition), followed by a second phase where the new intervention is systematically applied while the target behavior continues to be measured (treatment condition). This simple, fundamental research design is most accurately referred to as what type of design?

A-B-A-B reversal design

Multiple baseline design

A-B design

Alternating treatments design

The text explicitly mentions a two phase design that includes a baseline condition and a treatment condition This precisely describes an AB design where A represents the baseline phase and B represents the intervention phase While the AB design is simple and commonly used it is generally considered insufficient for demonstrating a functional relation in research due to its inability to rule out confounding variables However it is a foundational design An ABAB reversal design includes at least one reversal to baseline after the intervention allowing for stronger demonstrations of functional control A multiple baseline design introduces the intervention sequentially across different baselines An alternating treatments design also known as a multielement design rapidly alternates between two or more conditions within the same participant

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