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Grey Literature

  • Report​
  • Conference Abstract​
  • Dissertation & Thesis​
  • Registered Trial​
  • Interview​
  • Patent​
  • Newsletter​
  • White paper​
  • Book Chapter​
  • Web site of professional orgs. 

NOTE: Published literature tends to report statistically significant findings and may overestimate relationship between variables--referred to as “publication bias” (Whittemore, 2005). But there is debate about inclusion of grey literature because it lacks peer review. For more information see: ​ Conn VS, Valentine JC, Cooper HM, Rantz MJ. Grey literature in meta-analyses. ​ Nurs Res. 2003 Jul-Aug;52(4):256-61. Review. PubMed PMID: 12867783.​/p

Possible Sources for Grey Literature

  • Websites of professional associations
  • Google Scholar (but, remember, probably not reproducible!)