Sustained attention and subjective wellbeing
Evidence basis: randomised trials
A full mobile-internet block helped in one trial; social-media abstinence alone did not show clear benefit.
Population: Adults willing to restrict smartphone internet, plus participants in ten social-media-abstinence studies.
Research details
Summary
A randomized delayed-intervention study found improvements in sustained attention, mental health and subjective wellbeing after two weeks without smartphone internet. A systematic review of ten social-media-abstinence studies involving 4,674 people found no significant change in positive affect, negative affect or life satisfaction. The interventions differ and should not be treated as interchangeable.
Why this certainty
Limited because the strongest positive result is one trial with adherence difficulties, while related but different interventions have null pooled results.
Limitations
In the internet-block trial, only 119 of 467 enrolled participants met the predefined adherence criterion; attrition and self-selection limit generalization. Daily windows or blocking one feed were not the same intervention.

