Let's briefly count off and nickname some of the leading older-kids-are-smarter theories reviewed by the economists, which push back against the principle of first pancakes.
1) The Divided-Attention Theory: Earlier-born siblings enjoy more time, care and attention than later-born siblings because attention is divided between fewer kids.
2) The Bad-Genes Theory:The strong evidence of higher IQs among first children leads some to believe that later kids are receiving diminished "genetic endowment."
3) The I've-Had-It-With-Kids! Theory: Some parents decide to stop having more children after a difficult experience raising one. In that case, the poorer performance of later children isn't genetic, so much as selection bias: Some parents keep having children until they have one that's so problematic it makes them say "enough."
4) The No-One-to-Teach Theory: This is the idea that older siblings benefit from the ability to teach their younger brothers and sisters. Building these teaching skills helps them build learning skills that makes them better in school.
5) The Divorce Theory: Family crises like divorce are far more likely to happen after the first child is born (first marriage, then divorce, then a first child is not a common sequence) and they can disrupt later kids' upbringing.
6) The Lazy-Parent Theory: The general idea here is that first-time parents, scared of messing up their new human, commit to memory the first chapter of Battle Hymn of the Tiger Motherbut by the second or third child, they've majorly chilled out.
【为什么第一个孩子是最聪明的?】相关文章:
最新
2020-09-15
2020-09-15
2020-09-15
2020-09-15
2020-09-15
2020-09-15