The Online Privacy Foundation. An organisation which seeks to show how the internet can be used to manipulate people. They claim to be unbiased but I sense an agenda.
Of course you do, but really the research wasn’t necessary. Leave voters tended to be less well educated and more likely to be in lower paid “blue collar” jobs, and it is a known fact that IQ levels vary dramatically by profession
140 - Top civil servants; professors, and research scientists.
130 - Physicians, surgeons, lawyers, engineers
120 - School teachers, pharmacists, accountants, nurses, stenographers, managers.
110 - Foremen, clerks, telephone operators, salesmen, policemen, electricians.
100 plus - Machine operators, shopkeepers, butchers, welders, sheet metal Workers.
Below 100 - Warehouse men, carpenters, cooks, bakers, small farmers, truck and van Drivers.
90 - Laborers, gardeners, miners, factory packers and sorters.
https://psychologenie.com/average-iq-scorehttps://www.ipsos.com/ipsos-mori/en-uk/how-britain-voted-2016-eu-referendumAlso IQ declines the older you get and the older you are the more likely you were to have voted leave.
https://medium.com/psyc-406-2015/how-fast-does-iq-decline-can-you-do-anything-about-it-f5ca370d8b62