Project Grant 15PNIJ23GG04227SLFO

Award Date 1/1/24
Completion Date 12/31/26
Dollars Obligated $609K
Federal Grant Program
16.044
Assistance Type
Project Grant
Place of Performance
Bloomington, IN, USA
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  1. Publish the image pairs, examiner response distributions, and corresponding consensus-based likelihood ratios from a black box study.
  2. Provide the range of likelihood ratios associated with each statement in the categorical conclusion scale.
  3. Develop a tool to allow examiners to compare casework image pairs against benchmark pairs with known likelihood ratios, enabling the computation of likelihood ratios for casework without requiring image pairs to leave the laboratory.

This work seeks to address the profound miscalibration in the language used to express conclusions in the friction ridge discipline, which has been found to overstate the strength of evidence by up to five orders of magnitude. By translating examiner responses into numerical likelihood ratios, the project aims to provide a transparent, appropriate, and consistent approach to communicating the strength of forensic evidence, in alignment with other scientific disciplines.

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