1. Urban schools
However, results from two studies indicate comparable mean standard scores between the PPVT-R and McCarthy Scales of Children's Abilities. Correlations ranging from .16 to .78 have been obtained from studies examining the relationship between the PPVT-R standard score equivalents and various "g factor" scores such as Wechsler Full Scale IQS, Stanford-Binet IQS, and McCarthy Scales of Children's Abilities GCIs; correlation coefficients ranging from .40 to .60, however, are more common. ... Studies show that those children, who come from a so-called good environment or family, are the ...
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