Michael C. Neale

Date first presented

June 2021 Virtual Workshop


This half-hour talk describes the specification of the ACE model that is widely used in human behavioral genetic studies.  It considers how a model where a, c and e path coefficients are estimated differs from one where the variance components a2, c2 and e2 are directly estimated (plot spoiler: the latter allows variance components to go negative, which has less interpretability but better statistical properties).