Which term represents objective/quantifiable data on pre-intervention performance of the target skill?

• A. Baseline
• B. Modification plan
• C. Program/protocol
• D. Step-by-step implementation process

Answer: (A)

Baseline data refer to objective measurements collected before starting any intervention. They quantify the starting level of the target skill in concrete terms (like frequency, duration, percent correct, etc.), providing a clear reference point to judge whether the intervention leads to improvement. This pre-intervention data is essential for determining effectiveness and guiding goal setting. The other terms describe later steps or parts of the process—adjusting the plan, outlining the overall treatment, or detailing how to carry out the plan—but they don’t specifically represent initial, objective measurements taken before any intervention begins.