Syntes: School start time delays and high school educational outcomes: Evidence from the START/LEARN study (2023)

Källa: https://doi.org/10.1002/jad.12151 (Journal of Adolescence 95(4))

Verified content

• [abstract] 2,153 adolescents (mean age 15 at baseline) in the START/LEARN cohort, Minneapolis–St. Paul; schools that delayed start times vs comparison schools that stayed early; difference-in-differences one year before and two years after.
• [abstract] A 50–65-minute delay led to three fewer late arrivals, one fewer absence, a 14% lower probability of a behaviour referral and 0.07–0.17 higher GPA; absences and GPA differed only in the second year.
• [full text, PMC10257742] Two delaying schools, three comparison schools, five high schools in three districts; first-year GPA differences about zero; second-year +0.17 and +0.14 (weighted) GPA points.
• [full text] Larger GPA gains for students without free or reduced-price lunch and with a college-graduate parent.

Limits

• [assessment] Not randomised; two treated schools; sleep gains come from the cohort's earlier papers, not this one.

Added 2026-10-16 by the project (broadening attack run). [abstract] = from the published abstract; [full text] = read in the full text; [assessment] = the project's own assessment.