Which of the following best describes what baseline data is used for?

Baseline data serves a critical purpose in the context of behavioral interventions. Specifically, it provides a starting point for measuring change after an intervention has been implemented. This is essential because, without baseline data, it's challenging to determine whether any observed changes in behavior are due to the intervention or if they would have occurred naturally over time.

By collecting data prior to the intervention, practitioners can establish what the typical behavior looks like under normal circumstances. This allows for a clear comparison against the data collected during and after the intervention. The ability to see how behavior changes from this established baseline provides insight into the effectiveness of the treatment or intervention applied, thereby guiding future decisions and adjustments.

The other options, while they may have relevance in different contexts, do not accurately define the primary use of baseline data in relation to behavior analysis and intervention effectiveness.