@misc{indiciaed983dbd10121,
  title = {The effect of concept knowledge on discrimination learning.},
  author = {W O SHEPARD and M SCHAEFFER},
  year = {1956},
  doi = {10.1111/j.1467-8624.1956.tb04801.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/13330118/},
  note = {Source identifier: 13330118}
}