[eba7keb]

Are you asking if there is a body of research about child development/sleep/behavior management/learning in children? Yes, there is. Yes, it is public (and diffuse). And it is often misinterpreted and over/under-stated in parenting blogs and books (screen time is a great example of this). There are contradictory studies, but you have to look carefully and weigh the merits of the study (is it correlational? is it a valid study? what are the confounding variables? what is the size of the sample? what are the researchers conclusions?).

Have you ever read Emily Oster? She talks a lot about deciphering the data on pregnancy and caring for children (she wrote expecting better and crib sheet). It's messy science, but there is absolutely data. All the more reason a professional can support a parent to understand how (if) it applies to them and could inform decisions they make when working through a challenge.