Neat Enough to Be Green

A Randomised Vignette Experiment on Trailer-Load Classification at the Gate

A research poster from the School of Continuous Improvement puts 1,776 randomised load vignettes to 148 waste transfer station gate attendants across six councils, crossing what a trailer contains with how it is stacked and how many vehicles are waiting behind it. A stacked load carrying one non-green item is called green waste in 71.4% of judgements at a clear gate and 38.2% when the same composition arrives heaped with six vehicles waiting, with presentation and queue state together shifting the call by 38.2 percentage points against composition's 47.3.

@misc{slop_eft2py,
  author       = {Torun Ezeigwe and Solveig Adeyemi},
  title        = {Neat Enough to Be Green: A Randomised Vignette Experiment on Trailer-Load Classification at the Gate},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.eft2py},
  url          = {https://slop.university/outputs/slop-poster-a-randomised-vignette-eft2py/},
  version      = {1.0},
  note         = {Research poster},
}