Proud parents make eldest children the smartest - but it's love that counts most
First-born children are smarter than their siblings and it's the parents that make them that way. By the time younger siblings come along, parents are too worn out and stretched too thin to invest as much time in them.
Researchers from the University of Edinburgh, the University of Sydney and economic consulting firm the Analysis Group analysed data for approximately 5,000 US children enrolled in the National Longitudinal Survey of Youth.
By analysing the results in relation to parental behaviour, they found first-borns were given more support with tasks that involved thinking, and subsequently scored better on the tests.