Essen-Moller W
Definition
The formula for probability of paternity derived by Erik Essen-Moller in 1938 and widely adopted by forensic laboratories. W = CPI / (CPI + 1) when the prior probability is 0.5. Still the standard conversion used for serological and DNA paternity reports.
Related terms
- Combined paternity index (CPI)
- The product of all individual paternity indices across all marker systems tested. Assumes independence of the marker systems. The CPI is a...
- Exclusion probability (W)
- The proportion of the male reference population that would be excluded as the biological father by the marker panel tested. A high...
- Obligatory paternal allele
- The allele a child must have received from the biological father, identified by subtracting the mother's alleles from the child's genotype. The...
- Paternity index (PI)
- A likelihood ratio that compares the probability of the observed serological profile if the alleged father is the biological father to the...
- Probability of paternity (W)
- The posterior probability that the alleged father is the biological father, calculated from the CPI and a prior probability using Bayes' theorem....
Explained in
- Statistical Interpretation of Serological Relationship EvidenceThe formula for probability of paternity derived by Erik Essen-Moller in 1938 and widely adopted by forensic laboratories. W = CPI / (CPI + 1) when the prior p...