There are 4 different datasets. The first two of them have a similar structure, the third and fourth are different.

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FILES child_iq.csv & kid_iq.csv

Predict a child's IQ from his/her mother's age at childbirth, IQ, level of instruction ...
The data is from the Department of Statistics of the Columbia University in NYC.

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FILE gifted.csv

Child's score in a test of analytical skills vs mom and father's IQ plus other features.

The data is from a study by Graybill and Iyer, published in 1994

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FILE twins.csv

In the mid 20th century, a study was conducted that tracked down identical twins that were separated at birth: one child was raised in the home of their biological parents and the other in a foster home. In an attempt to answer the question of whether intelligence is result of nature or nurture, both children were given IQ tests.

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