@misc{indiciae1d6390fe2714,
  title = {Consistent contrast aids concept learning.},
  author = {D Billman and D Dávila},
  year = {2001},
  doi = {10.3758/bf03195764},
  url = {https://pubmed.ncbi.nlm.nih.gov/11820746/},
  note = {Source identifier: 11820746}
}