Table 6 MZ and DZ twin correlations for hippocampal volumes, squared hippocampal volumes and the SWB score and associated heritabilities (column h2) as computed using an AE model.

From: Associations between subjective well-being and subcortical brain volumes

Trait

Twin pair zygosity

h2

MZ

DZ

L. Hippocampus

0.750

0.285

0.762

L. Hippocampus2

0.659

0.277

0.636

R. Hippocampus

0.774

0.312

0.787

R. Hippocampus2

0.656

0.328

0.637

SWB

0.438

0.163

0.444