@misc{indiciae209d8004ec09,
  title = {The step method: a new adaptive psychophysical procedure.},
  author = {W A Simpson},
  year = {1989},
  doi = {10.3758/bf03208065},
  url = {https://pubmed.ncbi.nlm.nih.gov/2740198/},
  note = {Source identifier: 2740198}
}