An expository review of two methods of calculating the paternity probability

C. C. Li, A. Chakravarti

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


There are two methods for calculating the posttests probability of paternity, viz., the nonexclusion probability method (Ē method) and the paternity index method (λ method). This report reviews these two methods and explains the reasons behind them, in the hope that it might alleviate the current controversy between the advocates of these two methods. The emphasis throughout the paper is on exposition, using simple examples to illustrate certain principles or properties. A discussion follows the presentation of the two methods. The calculation of the paternity index is based on the genotype (or phenotype) of the accused man; and the value of the paternity index remains the same whether the accusation itself is true or false.

Original languageEnglish (US)
Pages (from-to)197-205
Number of pages9
JournalAmerican journal of human genetics
Issue number2
StatePublished - 1988
Externally publishedYes

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)


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