Final answer:
In research, a multiple baseline design is a reinforcement procedure applied progressively to different target behaviors to gauge the intervention's efficacy.
Step-by-step explanation:
When a reinforcement procedure is applied progressively to different target behaviors, the researcher is employing a multiple baseline design. This type of research design allows the researchers to implement the intervention at different times across different behaviors, settings, or individuals. During a multiple baseline design, the effectiveness of the intervention is demonstrated by the behavior changes only after the intervention is applied, allowing for a clear view of the intervention's impact.