They then accessed data for more than 5,000 of those children two years later. Over the intervening period, those in the study who reported spending more time than the norm on video games saw an increase of 2.5 IQ points above the average rise.
The IQ point increase was based on the kids' performance on tasks that included reading comprehension, visual-spatial processing, and a task focused on memory, flexible thinking, and self-control.
It's important to note that while the study only looked at children in the US and did not differentiate between video game types (mobile versus console games), it's still a valuable insight into gaming and IQ – and backs up the idea that intelligence isn't a fixed constant that we're born with.
Reading the full article will give you all the caveats, including how causation is not necessarily proven.
Not a big fan of absolute IQ number as metric of intelligence, but in relative terms for a same individual, it's already more reliable.
Anyhow, this is one for the Stackers who are into gaming~~