Scientists have found that how 4-year-old kids draw pictures of a child is an indicator of intelligence at age 14.
The researchers from King's College London who studied 7,752 pairs of identical and non-identical twins also found that the link between drawing and later intelligence was influenced by genes.
At the age of 4, children were asked by their parents to draw a picture of a child. Each figure was scored between 0 and 12 depending on the presence and correct quantity of features such as head, eyes, nose, mouth, ears, hair, body, arms etc.
The researchers found that higher scores on the Draw-a-Child test were moderately associated with higher scores of intelligence at ages 4 and 14.
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"The Draw-a-Child test was devised in the 1920s to assess children's intelligence, so the fact that the test correlated with intelligence at age 4 was expected," said Dr Rosalind Arden, lead author of the paper.
"What surprised us was that it correlated with intelligence a decade later," Arden said.
"Drawing ability does not determine intelligence, there are countless factors, both genetic and environmental, which affect intelligence in later life," Arden added.
The researchers also measured the heritability of figure drawing. Identical twins share all their genes, whereas non-identical twins only share about 50 per cent, but each pair will have a similar upbringing, family environment and access to the same materials.
Overall, at age 4, drawings from identical twins pairs were more similar to one another than drawings from non-identical twin pairs.
"This does not mean that there is a drawing gene - a child's ability to draw stems from many other abilities, such as observing, holding a pencil etc. We are a long way off understanding how genes influence all these different types of behaviour," Arden said.