I had to read the following article: Boyle, M. A., Augustine, J. J., Garton, E. M., Sharp, D. S., & Mansfield, H. M. (2022). Incorporating noncontingent reinforcement into functional communication training. Behavioral Development, 27(1-2), 43-52. https://doi.org/10.1037/bdb0000109 .

I have attached the article below, but I really need some help with answering the following questions:

(1). What research design was used?

(2). Explain how phase changes were made using this design.

(3). Was the research design appropriate to answer the research questions?

(4). List one other design that could be used to answer the research question.

file:///Users/KiDani/Downloads/Boyle%202022%20(4).pdf