Intelligence Quotient (IQ) and Browser Usage
"Intelligence Quotient (IQ) and Browser Usage" was a hoax study allegedly released by a Canadian company called AptiQuant Psychometric Consulting Co. on July 26, 2011, that claimed to have correlated the IQs of 100,000 internet users with which web browsers they used.
Source: Wikipedia — Intelligence Quotient (IQ) and Browser Usage (CC BY-SA 4.0)