Which of the following has been found to be associated with birth order?

Question

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Research has found that older children tend to have higher IQs compared to their younger siblings. This may be because they receive more attention and intellectual stimulation from their parents as the only child for a period of time before their younger siblings are born. However, it is important to note that birth order effects on intelligence are relatively small and other factors such as genetics and environment play a much larger role.

Which of the Following Has Been Found to Be Associated