@misc{indiciaea39505643ed8,
  title = {Spatial S-S proximity in human discrimination learning.},
  author = {C D Standish},
  year = {1966},
  doi = {10.1037/h0023445},
  url = {https://pubmed.ncbi.nlm.nih.gov/5966613/},
  note = {Source identifier: 5966613}
}