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Related Concept Videos

Genetic Screens02:46

Genetic Screens

Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which result in visible changes...

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Selection effects and database screening in forensic science.

Marjan Sjerps1, Ronald Meester

  • 1Netherlands Forensic Institute, Laan van Ypenburg 6, 2497 GB DEN HAAG, The Netherlands. m.sjerps@nfi.minjus.nl

Forensic Science International
|September 15, 2009
PubMed
Summary
This summary is machine-generated.

Selection effects in forensic science can be managed by adjusting prior odds when suspects are linked to evidence. This approach accounts for data-dependent hypotheses, ensuring evidential strength is balanced by initial probabilities.

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Area of Science:

  • Forensic Science
  • Legal Evidence Evaluation
  • Probability Theory

Background:

  • Selection effects can complicate the interpretation of forensic evidence.
  • The relationship between suspect selection and forensic findings requires careful consideration.
  • Data-dependent hypotheses pose challenges in traditional evidential analysis.

Purpose of the Study:

  • To demonstrate that selection effects in forensic science are manageable in principle.
  • To explain how prior odds can compensate for selection bias.
  • To clarify the role of forensic scientists in addressing these effects.

Main Methods:

  • Theoretical analysis of evidential reasoning under selection bias.
  • Application of probability theory to forensic scenarios.
  • Illustrative examples of selection effects in practice.

Main Results:

  • Selection effects do not inherently invalidate forensic evidence.
  • When a suspect is linked to evidence via a selection process, prior odds naturally compensate for the strength of the evidence.
  • Data-dependent hypotheses can be accommodated by considering their prior odds.

Conclusions:

  • Managing selection effects in forensic science is feasible through appropriate weighting of prior odds.
  • Forensic scientists should inform legal stakeholders about the impact of selection processes on evidence interpretation.
  • A clear understanding of prior odds is crucial for accurate legal decision-making involving forensic evidence.