Repeated school contacts had higher next-day contact rates after matching in three campaigns at one school

We tested whether a second day of contact history separates next-day contact rates after matching recent contact volume. We used three SocioPatterns sensor campaigns at one French school in 2011, 2012 and 2013. Candidate pairs had contact on the prior day. Both people had some recorded contact on all three days. We matched the focal participant, target day, partner class and prior-day contact-count group. Contacts also seen on the earlier day had next-day rates higher by 22.7, 21.7 and 18.1 percentage points. Exact prior-day count matching gave differences of 22.6, 21.1 and 17.6 points. Only 33% to 47% of eligible focal records entered the main comparison. All eight target-day estimates were positive. Participant-resampling ranges describe stability within each campaign. They do not measure uncertainty across schools. Stable pair preferences, schedules, attendance and sensor use can explain the association. The result does not establish a causal effect of repetition. The contribution is a matched chronological reference comparison with code, aggregate results, figures, source hashes and reproduction instructions. Raw source data retain their non-commercial licences and are obtained separately.

temporal networks · school contacts · contact repetition · matched comparison · human behavior · reproducibility