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- W4220676999 endingPage "111268" @default.
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- W4220676999 abstract "This study compares score- and feature-based methods for estimating forensic likelihood ratios for text evidence. Three feature-based methods built on different Poisson-based models with logistic regression fusion are introduced and evaluated: a one-level Poisson model, a one-level zero-inflated Poisson model and a two-level Poisson-gamma model. These are compared with a score-based method that employs the cosine distance as a score-generating function. The two types of methods are compared using the same data (i.e., documents attributable to 2,157 authors) and the same features set, which is a bag-of-words model using the 400 most frequently occurring words. Their performances are evaluated via the log-likelihood ratio cost (Cllr) and its composites: discrimination (Cllrmin) and calibration (Cllrcal) cost. The results show that (1) the feature-based methods outperform the score-based method by a Cllr value of 0.14-0.2 when their best results are compared and (2) a feature selection procedure can further improve performance for the feature-based methods. Some distinctive performance characteristics associated with likelihood ratios produced using the feature-based methods are described, and their implications will be discussed with real forensic casework in mind." @default.
- W4220676999 created "2022-04-03" @default.
- W4220676999 creator A5005415676 @default.
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- W4220676999 date "2022-05-01" @default.
- W4220676999 modified "2023-09-24" @default.
- W4220676999 title "Likelihood ratio estimation for authorship text evidence: An empirical comparison of score- and feature-based methods" @default.
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- W4220676999 doi "https://doi.org/10.1016/j.forsciint.2022.111268" @default.
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