@misc{indiciae6fea7e8daf0b,
  title = {Normative data for the Symbol Digit Substitution Task.},
  author = {F L Royer and G C Gilmore and J J Gruhn},
  year = {1981},
  doi = {10.1002/1097-4679(198107)37:3<608::aid-jclp2270370328>3.0.co;2-w},
  url = {https://pubmed.ncbi.nlm.nih.gov/6167593/},
  note = {Source identifier: 6167593}
}