Firstborn children have one more reason to lord over their younger siblings. Photo: Shutterstock

Firstborns both older and wiser because they don’t share mum and dad, study reveals

An assessment found that firstborns have higher IQs because they have had more attention from their parents in their early years

Topic |   Fairfax Media

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Firstborn children have one more reason to lord over their younger siblings. Photo: Shutterstock
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