Computers definitely lowered my test scores as a kid. I spent most of my class time thinking about being at home using my computer. Studying and doing homework was an exercise in doing the bare minimum as fast as possible

As an adult, I'm sure that the thousands of hours I spent trying to diagnose hardware problems, get games to run, mod games, create graphics (of all types), write software, and playing strategy games ended up giving me a tremendous advantage over my friends who finished their homework and watched TV or play console games.