(Department of Psychology and Neuroscience, University of Lethbridge, 2005) Lalumière, Martin L.
Behavioural genetics is about partitioning the sources of individual differences in
any trait that can be measured reliably. The fundamental question is how much of the
observed variability in a given trait can be explained by the fact that people have different
genes, and how much can be explained by the fact that people have been exposed
to different environments.