"Documented correlation" refers to a known connection or relationship between two things that has been observed, researched, and recorded in an organized and reliable way. Full definition
These problems include well - documented correlations with heart disease, diabetes, obesity, and accidents. (slaw.ca)
Scientists in Neuropsychology & Neuroscience Research at Kessler Foundation have made important contributions to the knowledge of cognitive decline in MS.. A recent study documented a correlation between cognitive performance and outdoor temperatures in individuals with MS.. Another finding was that short - term cognitive rehabilitation using of modified story technique improved memory in people with MS; moreover, the improvements in cognitive assessment correlated with changes on fMRI. (KesslerFoundation.org)
PsyBlog quotes Peter K. Jonason, one of the researchers who documented the correlation, to explain the phenomenon: «Those who scored highly on the Dark Triad traits [narcissism, Machiavellianism, and psychopathy] are, like many other predators such as lions and scorpions, creatures of the night. (inc.com)