First-born children tend to have higher IQs than their later-born siblings.

Question

Quizplus · Accepted Answer

Various studies have shown that first-born children often have higher IQs than their siblings. Some researchers have suggested that this may be due to the fact that parents tend to provide more intellectual stimulation for their first child, or because older siblings may act as "teachers" for their younger siblings, helping to enhance their cognitive development.

First-Born Children Tend to Have Higher IQs Than Their Later-Born