One Lamp, Two Clocks

Melatonin Onset Converges in Newly Cohabiting Couples over Their First Six Months

A research poster from the School of Continuous Improvement measures dim-light melatonin onset at home in 34 newly cohabiting couples at weeks 2, 13 and 26 after move-in, and finds the median within-couple gap narrowing from 79 to 43 minutes, almost entirely because the later partner advanced, with the household's last lamp-off shifting earlier ahead of the change in phase and no convergence among matched pseudo-couples.

@misc{slop_3usjbu,
  author       = {Eivind Onwuka and Ylva Ogunbanjo and Thandiwe Solberg},
  title        = {One Lamp, Two Clocks: Melatonin Onset Converges in Newly Cohabiting Couples over Their First Six Months},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.3usjbu},
  url          = {https://slop.university/outputs/slop-poster-whether-two-adults-3usjbu/},
  version      = {1.0},
  note         = {Research poster},
}