Because that’s all we seem to have measured. So, hypothesizing about whether there’s any other finer-grained causation in the data is the logical next step.
Me personally, I have immense trouble believing that passively watching entertainment has the same effect on working memory as, say, playing video games. And even within video games there’s probably a distinction between the more story-driven games that are a lot more passive to play, versus puzzle games that require active reasoning, versus games that test reaction time or memorization, etc.
(Full disclosure: I was a child of the 80’s and raised by a Nintendo and my computer. I think I turned out ok but I don’t have any alternative childhood to compare to)
Because that’s all we seem to have measured. So, hypothesizing about whether there’s any other finer-grained causation in the data is the logical next step.
Me personally, I have immense trouble believing that passively watching entertainment has the same effect on working memory as, say, playing video games. And even within video games there’s probably a distinction between the more story-driven games that are a lot more passive to play, versus puzzle games that require active reasoning, versus games that test reaction time or memorization, etc.
(Full disclosure: I was a child of the 80’s and raised by a Nintendo and my computer. I think I turned out ok but I don’t have any alternative childhood to compare to)