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Behav Genet. 2003 May;33(3):271-8.

A model-fitting implementation of the DeFries-Fulker model for selected twin data.

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1
Social, Genetic & Developmental Research Centre, Institute of Psychiatry, London SE5 8AF, UK. s.purcell@iop.kcl.ac.uk

Abstract

In this research note, DeFries-Fulker (DF) regression analysis is reframed in model-fitting terms, where an individual's expected score is modeled as a function of their co-twin's proband status. This more flexible implementation of the DF model allows DZ-O twins to be incorporated in a sex-limitation model. Brief simulation results are presented along with the Mx scripts used.

PMID:
12837017
[Indexed for MEDLINE]
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