Your DNA determines whether you're an introvert or an extrovert — here's how to tell which one you are

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• It is unlikely that you are entirely an extrovert or an introvert.
• It's more likely you are somewhere in the middle — but many of us associate with one side more than the other.
• Scientific evidence has shown how extroverts and introverts differ in both behaviour and biology.
• The way you are is written in your DNA, so it's unlikely you'll be able to change it.

At some point in your life, you've probably been described as an extrovert or an introvert.