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Forensic voice comparison and the paradigm shift.

Geoffrey Stewart Morrison1

  • 1School of Language Studies, Australian National University, Canberra, ACT 0200, Australia. geoff.morrison@anu.edu.au

Science & Justice : Journal of the Forensic Science Society
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Summary
This summary is machine-generated.

Forensic science is shifting to a quantitative, data-based approach using the likelihood-ratio framework. This paradigm, adopted for DNA analysis, is now emerging in forensic voice comparison, though adoption remains limited.

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Area of Science:

  • Forensic Science
  • Forensic Voice Comparison
  • Likelihood-Ratio Framework

Background:

  • The field of forensic science is undergoing a significant paradigm shift.
  • This shift involves moving towards quantitative data-based methods and the likelihood-ratio framework for evaluating evidence reliability.
  • This new paradigm was widely adopted for DNA profile comparison in the 1990s.

Purpose of the Study:

  • To describe the new quantitative, data-based paradigm in forensic science.
  • To outline the historical adoption of this paradigm in forensic voice comparison over the past decade.
  • To assess the current state of this paradigm shift within the forensic voice comparison community.

Main Methods:

  • Description of the quantitative data-based likelihood-ratio framework.
  • Historical review of the adoption of this framework in forensic voice comparison.
  • Analysis of the current prevalence of the new paradigm in the field.

Main Results:

  • The new paradigm emphasizes quantitative data and the likelihood-ratio framework for reliable results.
  • Forensic voice comparison is gradually adopting this new paradigm, following its earlier adoption in DNA analysis.
  • The paradigm shift in forensic voice comparison is incomplete, with proponents still representing a minority.

Conclusions:

  • A paradigm shift towards quantitative, data-driven forensic analysis is underway.
  • The likelihood-ratio framework is central to this shift, enhancing the reliability of forensic comparisons.
  • While progressing, the full adoption of this new paradigm in forensic voice comparison is yet to be achieved.