When pupils hit 16, their reading age typically falls to at least three years behind, the study found.
Dr. Hopkins, though, stands behind the study.
But Dr. E. William Colglazier, the academy's executive officer, said the academy stands behind the study.
The scientific hypothesis behind the study, the latest in a growing number examining the effects of biodiversity, is simple.
This paper describes the methods and rationale behind the study and the general characteristics of the sample.
The chances of them doing so are 5 in 10,000, the scientists behind the study claim.
"We don't include that because we don't have good data on that," said Mark Lino, the economist behind the study.
The team behind the study set out to pin-point why certain foods are more addictive than others.
Or, as Professor Gregory Clark and Dr Neil Cummins, the two economists behind the study, explain: "To those who have, more is given".
Michal Kosinski, one of the academics behind the study, said he believed Facebook users would be "spooked" by the findings and called for regulatory intervention by politicians.
Experts behind the study said more research was needed to see whether using drugs to lower blood pressure would help prevent people developing type 2 diabetes.
