> Leading up to the 1990s, IQ scores were consistently going up, but in recent years, that trend seems to have flipped. The reasons for both the increase and the decline are sill very much up for debate.
Interestingly, you could substitute "homicide rate" for "IQ" here and the statement would still be accurate. Ignorance is bliss?
>The study, published in the journal Intelligence, used an online, survey-style personality test called the Synthetic Aperture Personality Assessment Project to analyze nearly 400,000 Americans. The researchers recorded responses from 2006 and 2018, in order to examine if and how cognitive ability scores were changing over time within the country.
Presumably the testing scores collected between the 1930s and 1990s weren't online tests. I wonder if the drop is explainable by people not taking an online IQ test very seriously during the golden age of the buzzfeed quiz.