Likelihood ratio (LR)
The ratio of two conditional probabilities: the probability of the observed evidence given the prosecution's hypothesis (same source), divided by the probability of the observed evidence given the defence's hypothesis (different source). An LR greater than 1 supports the prosecution hypothesis; an LR less than 1 supports the defence hypothesis. The LR is not a probability of guilt.
Explained in these topics
- Allele Frequencies, Random Match Probability and the Likelihood Ratio
- Voice Analysis: Spectrography, Speaker Identification and Legal Aspects
- Standards, Accreditation and Admissibility in QDE
- Soil Comparison Casework and Statistical Inference
- Spectrographic Voiceprint History and Its Modern Rejection
- Conclusion Scales: SWGDOC, ENFSI and Courtroom Language
- Standards, Accreditation and Admissibility in Fingerprint Evidence
- Paint Databases (PDQ, EUCAP) and Comparison Casework
- Tool-Mark Comparison Microscopy and 3D Imaging
- FRStat, Likelihood Ratios and the Post-2009 NAS Debate
- Cognitive Bias, Expert Testimony and the 2009 NAS Critique