Forensic Source Conclusions: Twenty Threats to Validity

Jonathan J. Koehler*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

4 Scopus citations


Forensic science evidence may be the most powerful weapon in the arsenal of law enforcement officials and prosecutors. As such, it is important to be aware of factors that threaten the validity of forensic source conclusions (e.g., This bullet was fired from that gun ). This paper identifies 20 threats to the validity of forensic source conclusions including threats that spring from (a) the evidentiary samples themselves, (b) forensic examiners and the procedures they use, (c) features of the law, and (d) cognitive limitations of jurors and others who must weigh forensic science source claims.

Original languageEnglish (US)
Pages (from-to)149-161
Number of pages13
JournalZeitschrift fur Psychologie / Journal of Psychology
Issue number3
StatePublished - Jul 2020


  • bias
  • error rate
  • forensic science
  • testing
  • validity

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Psychology(all)


Dive into the research topics of 'Forensic Source Conclusions: Twenty Threats to Validity'. Together they form a unique fingerprint.

Cite this