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Article

A simple algebraic demonstration of the validity of DeFries-Fulker analysis in unselected samples with multiple kinship levels.

Behavior genetics - 1 May 1994

Rodgers J L, McGue M

Abstract excerpt

DeFries and Fulker's (Behav. Genet. 15, 467-473, 1985) regression procedure (DF analysis) to estimate c2 and h2 was originally applied to selected twin data. Since then, DF analysis has been applied more broadly in unselected data and with multiple (nontwin) kinship levels. Theoretical work based on the matrix algebra of variance-covariance matrices has shown that estimates of c2 and h2 are unbiased in selected...

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PMID: 7945155
DOI: 10.1007/BF01067192

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-08.1.

Source receipt: pubmed, retrieved 7 Sept 2026.

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