According to research’s results, IQ levels drop between 1970 to 2009 by taking the IQ tests of 730 thousand males obligated to military service and the drops have mostly been caused by the smart device use.
According to the results, frequent use causes a decrease in brain functions and makes people lazy. Instead of Flynn’s Impact, the drops in IQ levels can not be associated with smart devices; it also includes nutrition, social envoirment and educational system.