The study used the HEXACO Personality Inventory to assess 6 personality traits based on sibling birth order: honesty-humility, emotionality, extraversion, agreeableness, conscientiousness, and ...
Sibling relationships are important. While friendships come and go, you’re stuck with your siblings. This relationship is oftentimes one of the longest relationships in a person’s life.
That said, there is some research that suggests IQ decreases as birth order increases. "Firstborns are found to have a slightly higher IQ than their younger siblings," Read said. The theory behind ...
Many people claim that whether they are the oldest sibling or the middle child ... Expert Kevin Leman wrote a book on how he believes birth order can influence a relationship, called The New ...