Dopamine genes are linked to Extraversion and Neuroticism personality traits, but only in demanding climates.

ABSTRACT: Cross-national differences in personality have long been recognized in the behavioural sciences. However, the origins of such differences are debated. Building on reinforcement sensitivity theories and gene-by-environment interactions, we predict that personality trait phenotypes linked to dopaminergic brain functions (centrally involved in reward processing) diverge most strongly in climatically stressful environments, due to shifts in perceived rewards vs risks. Individuals from populations with a highly efficient dopamine system are biased towards behavioural approach traits (Extraversion and Emotional Stability) due to higher perceived reward values, whereas individuals from populations with a less efficient dopaminergic system are biased towards risk avoidance. In temperate climates,

SUBMITTER: Fischer R 

PROVIDER: S-EPMC5789008 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature