People in 1970 had to navigate with paper maps, which is actually a cognitively ...

		thebooktocome on May 22, 2019 \| parent \| context \| favorite \| on: IQ rates are dropping in many developed countries People in 1970 had to navigate with paper maps, which is actually a cognitively loaded activity. People in 2019 do not, so they don't get the same amount of spatial reasoning exercise from that activity.