They didn't discover a correlation between drawing ability and intelligence; as the article admits, the Draw-A-Man test has been in use since the 1920s. They established a correlation between DAM scores at age 4 and scores on other IQ tests at age 14. Which is a little interesting (since the most common rule of thumb I've heard is that IQ scores are near-totally unreliable before age 6), but not very.
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They didn't discover a correlation between drawing ability and intelligence; as the article admits, the Draw-A-Man test has been in use since the 1920s. They established a correlation between DAM scores at age 4 and scores on other IQ tests at age 14. Which is a little interesting (since the most common rule of thumb I've heard is that IQ scores are near-totally unreliable before age 6), but not very.