Using subsampling to estimate the strength of handwriting evidence via score-based likelihood ratios.

Abstract:

:The likelihood ratio paradigm has been studied as a means for quantifying the strength of evidence for a variety of forensic evidence types. Although the concept of a likelihood ratio as a comparison of the plausibility of evidence under two propositions (or hypotheses) is straightforward, a number of issues arise when one considers how to go about estimating a likelihood ratio. In this paper, we illustrate one possible approach to estimating a likelihood ratio in comparative handwriting analysis. The novelty of our proposed approach relies on generating simulated writing samples from a collection of writing samples from a known source to form a database for estimating the distribution associated with the numerator of a likelihood ratio. We illustrate this approach using documents collected from 432 writers under controlled conditions.

journal_name

Forensic Sci Int

authors

Davis LJ,Saunders CP,Hepler A,Buscaglia J

doi

10.1016/j.forsciint.2011.09.013

subject

Has Abstract

pub_date

2012-03-10 00:00:00

pages

146-57

issue

1-3

eissn

0379-0738

issn

1872-6283

pii

S0379-0738(11)00460-9

journal_volume

216

pub_type

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