At matched durations, student pairs in the same class had more next-day contact in three records from one French school

We tested whether student pairs in the same class had more next-day contact at equal initial contact durations. We used three public sensor records from one French school in 2011, 2012 and 2013. We matched exact initial daily duration and day transition. Both students had to have some recorded contact on the next day. The weighted within-class minus cross-class differences were 19.7, 22.2 and 31.6 percentage points. All 12 adjacent-day transitions had positive differences. The direction remained after an exact match within each student and after deletion of each class. Common duration strata retained 87–89% of eligible pair-day records, but only 28–30% of initial contact time. The result mainly describes shorter contacts with support in both class types. Shared schedules, partner pools, friendship and sensor use can contribute to the gap. The study does not identify a cause or a result for other schools. The package provides code, aggregate counts, source provenance, checks and repeat instructions. Original source records remain external under their source terms.

contact networks · school · repeated contact · duration matching · temporal networks · reproducible benchmark