> Citation needed? This is the sort of thing that people use to argue against sleep training, too, but I don’t believe much evidence has been found for that.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4088358/
https://www.pnas.org/doi/full/10.1073/pnas.0504767102
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7502223/
https://pubmed.ncbi.nlm.nih.gov/9599775/
https://doi.org/10.4324/9780203758045
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8250458/
https://pubmed.ncbi.nlm.nih.gov/33924970/
https://link.springer.com/chapter/10.1007/978-3-662-67860-2_...