Would this look any different if it displayed average salary instead of iPhone price as a percentage of average salary?

Here’s todays winner for most unintelligible title

Substantial confounding in studies like this though. I haven’t read the paper but they usually can only control for basic demographics, not the nuances of parenting style and engagement, which could certainly be correlated with both screen time and development.

Statistical modeling.

And yes, I am miffed about the use of the word “exponential” in this post’s title.