@misc{indiciae2a914a58686b,
  title = {Perception as substitute trial and error.},
  author = {D T CAMPBELL},
  year = {1956},
  doi = {10.1037/h0047553},
  url = {https://pubmed.ncbi.nlm.nih.gov/13359603/},
  note = {Source identifier: 13359603}
}