The Booking Knock as Increment Device

A regression discontinuity at the thirty-minute performance-review booking end

A research poster from the School of Continuous Improvement exploits the naturally occurring cutoff at a glass booth's thirty-minute booking-end chime across 214 performance-review 1:1s on 18 open-plan floors, finding increment award falls from 62% in the last ninety seconds before the knock to 18% in the first ninety seconds after it. The School adopts a published Increment Window that withholds the annual increment outside that ninety-second close, with no line-manager override.

@misc{slop_cdet5h,
  author       = {Signy Okpara and Joost Nwosu and Solveig Adeyemi},
  title        = {The Booking Knock as Increment Device: A regression discontinuity at the thirty-minute performance-review booking end},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.cdet5h},
  url          = {https://slop.university/outputs/slop-poster-thirty-minutes-is-cdet5h/},
  version      = {1.0},
  note         = {Research poster},
}