Elder siblings take care of younger ones, and thus become responsible.
A YouGov study spoke to siblings, asking them to rate their personality traits alongside those of their brothers and sisters, and found out that birth order plays an important role in shaping your personality. The youngest child tends to be funnier, and more easy-going, while the oldest has a bigger sense of responsibility and is more family-orientated.
The study revealed
The most significant difference is in feeling the burden of responsibility — 54 per cent first borns say they are more responsible than their siblings.
Younger siblings, in the meantime, are more likely to say they are more funny (46% compared to 36% of elder siblings), more easy going and more relaxed.
It does sound logical. Elder siblings take care of younger ones, and thus become responsible. Younger siblings… well, they are being taken care of. They can afford to be easy-going!