The article itself is about such studies in relation to the brain. A simple google search brings dozens of related results. https://all4ed.org/articles/a-decad

The article itself is about such studies in relation to the brain. A simple google search brings dozens of related results. https://all4ed.org/articles/a-decade-of-decline-survey-finds-a-decline-in-literacy-skills-among-college-graduates/ https://all4ed.org/articles/a-decade-of-decline-survey-finds... https://theweek.com/articles/875253/unsurprising-decline-childhood-literacy-america https://theweek.com/articles/875253/unsurprising-decline-chi... https://www.edweek.org/ew/articles/1996/05/15/34roch.h15.html https://www.edweek.org/ew/articles/1996/05/15/34roch.h15.htm... https://ivyreads.com/blog/academic-literacy-is-declining https://ivyreads.com/blog/academic-literacy-is-declining https://www.researchgate.net/publication/247760981_Literacy_in_Decline_Untangling_the_Evidence https://www.researchgate.net/publication/247760981_Literacy_... https://www.nytimes.com/2019/10/30/us/reading-scores-national-exam.html https://www.nytimes.com/2019/10/30/us/reading-scores-nationa... Furthermore, if your only metric of determining truth is a social science study, I think you're perhaps missing the forest for the trees.