Overview
- Published in late July 2026, the UCLA experiment showed a statistically significant association between owning a personal cellphone and lower reading comprehension among third- and sixth-graders in California schools.
- The researchers found no difference in scores based on whether a child brought a phone to school that day, indicating ownership rather than immediate presence was tied to poorer reading performance.
- The study could not test distraction from notifications because students received almost no alerts during testing and the ownership measure was observational, so the authors do not claim phones cause lower scores.
- An exception emerged for students from non-English-speaking homes: earlier use of phones for texting was associated with improved reading comprehension by sixth grade, suggesting phones can sometimes aid language practice.
- The sample was linguistically diverse and funded by the Flora Family Foundation, but authors and reporters stress the study’s small sample and methodological limits and call for more experiments before changing school or parenting policies.