They have both advantage and inconvenient, they both suit to this type of data though for sure.

if you're doing it in python, maybe try to plot it as a box plot. It's quite a mess rn.

Also, passing a test with a psychologist is different than passing a test online right due to the psychologist being able to observe you. Am I right ?

goldfish attention span is also a myth. If you actually want to see if online activities reduce attention span, pick two humans group, one that use a lot internet and one that don't, and compare the two groups for different activities.