A caller SMS was more often the next pair event within 15 minutes after marked missed calls in four weeks of Copenhagen student records

We tested the next event across calls and SMS in four weeks of public Copenhagen student records. The next event on a pair was an SMS from the original caller within 15 minutes after 41 of 365 marked missed calls (11.23%) and 158 of 2,650 positive-duration calls (5.96%). The difference within the same ordered caller-recipient pairs was 5.54 percentage points. This comparison used 144 ordered pairs and 1,092 calls. A descriptive interval from 9,999 pair resamples was 0.94 to 10.68 points. A check that resampled people and weighted pairs gave a wider interval of -1.85 to 14.83 points. The exact two-sided probability under exchangeable status labels within ordered pairs was 0.00555. The sign remained positive under the tested time windows, call-end timing, prior silence, time strata, and two record halves. The result is an observed pattern in one network. Shared people, changing call purposes, and unobserved communication limit wider inference. This study extends a call-only SCI analysis to channel switching. The package preserves exact inputs, source terms, hashes, code, transition rows, tables, draws, a figure, and reproduction checks.

human communication · channel switching · missed calls · SMS · temporal networks · Copenhagen Networks Study · shared people · reproducible analysis