The role of birth order in shaping who we are has been a matter of some debate in psychology.
Recent research has cast doubt on the idea that an individual’s position in relation to their siblings influences their personality, for instance. But there may be other domains where birth order is still important: in particular, researchers have found that children with a greater number of older siblings seem to have worse verbal skills.
However, a new study published in Psychological Science has found that the situation is a bit more complicated than that. Young children with an older sibling do indeed perform worse on language measures, the authors find — but only if that sibling is a brother.
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