NEW YORK (Reuters Health) - Firstborns frequently score higher on IQ and achievement tests than their younger siblings, but a new report suggests that how siblings are raised, not their birth order, ...

WASHINGTON -- Boys at the top of the pecking order -- either by birth or because their older siblings died -- score higher on IQ tests than their younger brothers. The hot debate: The question of ...

For decades, researchers have observed that, on average, firstborns score higher on intelligence tests than their later-born siblings. The further down a child is in birth order rank, the lower his or ...

TEHRAN, 8 May (BelTA - IRNA) - Iran ranks fourth globally in intelligence with an impressive average IQ of 106.3, according to the latest update from the International IQ Test on January 1, 2025. The ...

According to the recent development, couples in the UK are reportedly utilizing a legal loophole to rank their embryos based ...