@misc{indiciaed6883658eab1,
  title = {Same/different abstract-concept learning by pigeons.},
  author = {Jeffrey S Katz and Anthony A Wright},
  year = {2006},
  doi = {10.1037/0097-7403.32.1.80},
  url = {https://pubmed.ncbi.nlm.nih.gov/16435967/},
  note = {Source identifier: 16435967}
}