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Corinna Hartmann

Education
7 min

Poor only child?

They were long regarded as selfish, self-centred and spoilt. However, only children are in no way inferior to children with siblings when it comes to social skills.

Development
8 min

Successful first-borns, creative stragglers?

There are many popular assumptions about the influence of sibling order on development. Only one stands up to scientific scrutiny.

Education
7 min

How similar are twins really?

Are twins closer than other siblings? How similar are they really? What role do their genes play? And their environment?

Education
9 min

Siblings - a bond for life

From the very beginning, siblings are allies who fight battles together against mum and dad. About a special and particularly stormy relationship.

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