First-born children are generally found to have a slight, yet statistically significant, edge in IQ and academic performance compared to their younger siblings. Studies indicate this advantage often stems from more intense parental attention, intellectual stimulation, and teaching younger siblings, rather than biological factors.
Firstborn children tend to have slightly higher IQ scores on average, with studies showing a small but consistent advantage over younger siblings, often attributed to increased parental attention and different parenting styles as subsequent children are born, though these IQ differences are generally considered too small to be practically significant in life.
A University of Edinburgh study shows first-born children have higher IQs and better thinking skills than their siblings. The study says that shows first-born kids get more mental stimulation than their brothers and sisters.
The University of Edinburgh study reported that the oldest child tends to have a higher IQ and thinking skills than their younger siblings. This is due to higher mental stimulation the first-born receives, CBS affiliate KUTV reports.
Now a new study, published in the Proceedings of the National Academy of Sciences and based on data from 20,000 individuals, concludes that birth order does matter when it comes to IQ – with the oldest having slightly higher IQ than their younger siblings.
In population-based studies, maternal IQ is the single greatest predictor of child IQ [17]. Maternal IQ reflects not only genetic influences, but also incorporates environmental factors affecting the child.
There's no single "hardest" sibling role, as it depends on family dynamics, but research suggests middle children often struggle with feeling overlooked, while second-born sons are linked to more behavioral issues, and oldest children can face high pressure and anxiety. Each position has unique challenges, from the middle child's search for identity to the oldest's responsibility and the youngest's potential to be babied or rebel.
Middle children often get the least attention, feeling caught between the responsible older sibling and the babied younger one, leading to a sense of being overlooked, but this can foster independence, negotiation skills, or a need to rebel for recognition, depending on the family dynamic. While firstborns get early focus and lastborns get nurturing as the "baby," middle children can feel like they don't fit a specific role, says psychologist Dr. Kevin Leman.
Parents tend to favor younger siblings, daughters, and the more agreeable—often without realizing it. New research from BYU highlights how subtle parental preferences—based on birth order, personality, and gender—can shape sibling relationships and family dynamics.
The "3 6 9 rule" for babies refers to common times for growth spurts, periods of rapid development usually occurring around 3 weeks, 6 weeks, 3 months, 6 months, and 9 months of age, though timing varies. During these times, babies often get fussier, sleep more or less, and show increased hunger (cluster feeding), signaling their bodies need more fuel for intense growth and developmental changes, say experts.
September. September is often reported as the smartest birth month because kids born during it are usually the oldest in their grade and therefore have an academic advantage over their peers.
First-born Girls Most Likely to Succeed. Bossy, know-it-all older sisters everywhere now have something else to lord over their younger siblings: Researchers have found that firstborn girls are the most ambitious and successful children in their families.
February Babies Are Visionaries
This visionary nature drives them to think outside the box, whether in their personal lives or professional endeavors. From designing groundbreaking technology to writing the next great novel, February babies have a creative spark that makes them stand out from the crowd.
With middle children being "stuck in the middle," it can become standard for the middle-born to feel unloved or have less attention on them from their parents. There are certain family situations where birth order and middle child syndrome don't apply.
Firstborn and only children more likely to face anxiety, depression, study finds. Birth order plays a role in mental health, according to a new study. Being the eldest sibling or being an only child may be linked to anxiety and depression in kids as young as age 8, according to a new study.
While genetics are the main factor, studies show firstborn children tend to be taller than later-borns, with height decreasing incrementally with birth order, though this can be influenced by nutrition, parental care, and specific gene combinations, leading many to observe youngest or later-born siblings growing taller in reality.
According to a study from researchers from Brigham Young University's School of Family Life, it's the younger sibling that benefits the most from being the perceived favourite because they're more focussed on social comparison than their elders.
Although the term “youngest child syndrome” persists, it is not a medical or psychological disorder. There is no official diagnosis and no clinical definition for this syndrome. However, some of the traits associated with this birth order position include spoiled, free-spirited, and persistent.
While Oprah Winfrey's exact IQ score isn't officially published, estimates place her in the "genius" range, with online discussions citing a Wechsler IQ Z-score of 2.73, suggesting an IQ around 140, indicating very superior intelligence, well above average. She demonstrates high intelligence through her vast business acumen, powerful communication skills, and extensive knowledge, consistent with a very high IQ.
How is your IQ calculated? To calculate a person's IQ, take the person's mental age and divide it by their chronological age. Next, multiply that number by 100. For example, if a person has a mental age of 11, and they are 9 years old, the equation will look like this: 11/9 x 100= 122.