@misc{indiciae68de37112fb3,
  title = {Attentional changes during discrimination learning by retarded children.},
  author = {N N Singh and I L Beale},
  year = {1978},
  doi = {10.1901/jeab.1978.29-527},
  url = {https://pubmed.ncbi.nlm.nih.gov/670856/},
  note = {Source identifier: 670856}
}