Normative data for 5-6 year olds on the Chinese Preschool and Primary Scale of Intelligence (WPPSI) are reported for samples tested in 1984 and 2006. There was a significant increase in Full Scale IQ of 4.53 points over the 22 year period, representing a gain of 2.06 IQ points per decade. There were also significant increases in Verbal IQ of 4.27 points and in Performance IQ of 4.08 points.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5798472 | PMC |
| http://dx.doi.org/10.1016/j.intell.2012.01.008 | DOI Listing |
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