A new study by the university of Edinburgh has found that the first-born children have superior thinking skills than their younger siblings due to more mental stimulation they receive from the parents.This research could explain the age-old debate, so-called birth order effect wherein, older siblings enjoy better education and wages in the later life.
The study found that the parents provide the same level of emotional support to their children but the older siblings receive more help with regard tasks concerned with the development of thinking skills. Younger siblings receive less mental stimulation from their parents.
Research Study
The study was conducted in partnership with analysis group and the university of Sydney and examined the survey data collected by the US bureau of Lab our statistics. Researchers observed the children from birth to 14 years of age for a period of two years. As part of the study, they observed 5,000 children found that first-born siblings have higher I.Q than the younger ones.
The researchers conducted various tests that included reading, matching letters, names, reading single words aloud and picture vocabulary tests. The study found that the advantages start in first-borns from their time of birth to three years of age. The Researchers also gathered information regarding the family background and economic conditions. The study also found that with more children parents tend to provide less mental stimulation. It was also found that the mothers adopted risky behaviors like Smoking and drinking during later pregnancy.
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Dr. Ana Nuevo-Chiquero, of Edinburgh University's school of economics, said: "Our results suggests that broad shifts in parental behavior are a plausible explanation for the observed birth order differences in education and labor market outcomes.
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