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The Brain & Psychology
The science under the surface: how personality forms, what genes and the brain contribute, and what decades of research say about why people differ.
Am I an Introvert, Extrovert, or Ambivert?
Introvert, extrovert, or somewhere in between? It comes down to what drains you and what recharges you. Here is how to place yourself on the spectrum.
The Neuroscience of Introversion and Extraversion
From a lemon juice experiment in the 1960s to modern dopamine research, here is what neuroscience actually shows, and does not show, about introverts and extraverts.
Where Personality Comes From: Genes, Brain, and Experience
Twin studies put personality's heritability at roughly 40 to 60 percent, but that number is stranger, and more interesting, than it first appears.