Correlating smartphone ownership with mental health issues - without diving into how they actually use them - would be like correlating kids simply sitting in a

Correlating smartphone ownership with mental health issues - without diving into how they actually use them - would be like correlating kids simply sitting in a car with them not being able to drive it safely. Or, to use another of my examples, it would be like correlating cigarette possession with cancer rates. Yes, you'll probably see some correlation, unsurprisingly, but it doesn't give any information on causation.