Importantly, the direction of causality remains to be seen: Does multi-tasking make us more anxious and depressed? Or, as the study’s leader, Mark W. Becker, an assistant professor of psychology, put it in an email, “are depressed and anxious [people] turning toward media multitasking as a form of distraction?”
The results of this study aren’t conclusive in that regard, he says. But they’re an important step. “While that question will not be easy to answer, it is worth pursing because the practical implications of the findings depend on the causal direction,” he said."