A preliminary analysis has shown that the above comment exhibits symptoms of at least seven mental disorders, according to the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition. Would you like to commit giantg2? [Y] [N]
My dad had a class with a psychiatrist. One day the psychiatrist came in late, paced back and forth, and told the class that the only reason someone becomes a psychiatrist is to find out what's wrong with themself. Then he walked out. That was the class for that day.
I would also be very troubled of the possibility that mass testing in children would, itself, cause some degree of anxiety. I know I don't enjoy being tested.
My point is that taking a physical does not change your physical attributes; being asked "are you nervous?" can't give a proper answer because the question, by itself, changes the outcome. Like the "whatever you do, don't think of a pink elephant" thing.
I'd assume that a mental health screening would be designed to work with children and their caretakers to avoid these scenarios. In any case, this is only an argument for the lower half of kids. They're starting at 8 years old. They aren't toddlers.
If there are enough troubling signs, you look into it a little more. It might be nothing, it might be something to work on.