This happens a lot in social sciences; more than once I've gotten my intuition "disproven" by a study only for that study itself to later be proven wrong.
However this study in particular is pretty bad, see the comment elsewhere about the screentime not spent not going down (possibly cause of extant classroom bans)
However this study in particular is pretty bad, see the comment elsewhere about the screentime not spent not going down (possibly cause of extant classroom bans)