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Updated: Jan 20, 2026

Enhanced Genetic Analysis of Single Human Bioparticles Recovered by Simplified Micromanipulation from Forensic ‘Touch DNA’ Evidence
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What do forensic analysts consider relevant to their decision making?

Brett O Gardner1, Sharon Kelley1, Daniel C Murrie1

  • 1Institute of Law, Psychiatry and Public Policy, University of Virginia, United States.

Science & Justice : Journal of the Forensic Science Society
|September 2, 2019
PubMed
Summary

Forensic analysts surveyed generally find suspect or victim information irrelevant. However, significant variability exists, highlighting a need for consensus on task-relevant data to prevent bias in forensic science.

Keywords:
Cognitive biasContextual effectsForensic decision makingForensic scienceTask-relevant information

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Area of Science:

  • Forensic Science
  • Cognitive Psychology
  • Legal System

Background:

  • Irrelevant contextual information can bias forensic science analyses.
  • Authorities recommend limiting analysts' access to potentially biasing information.
  • Determining task-relevant versus task-irrelevant information presents a significant challenge.

Purpose of the Study:

  • To survey forensic analysts on their perception of relevant versus irrelevant information in analyses.
  • To identify potential variability in what forensic analysts consider essential for their tasks.

Main Methods:

  • Survey administered to 183 forensic analysts.
  • Data collected on analysts' views of task-relevant information.
  • Analysis of responses across different forensic disciplines.

Main Results:

  • Analysts generally do not consider suspect or victim information essential to their tasks.
  • Significant variability observed in relevance judgments among analysts.
  • Discipline-specific differences in defining task-relevant information were noted.

Conclusions:

  • Lack of consensus on task-relevant information hinders implementation of context management procedures.
  • Foundational gaps exist in understanding crucial elements of forensic decision-making.
  • Establishing agreed-upon definitions of relevance is critical for reducing bias in forensic analyses.