SKODAK AND SKEELS - THE INFLATED MOTHER-CHILD IQ GAP

Skodak and Skeels (1949) is one of the few studies that gives IQ score s for both adopted children and their biological mothers. All tend to accept the reported result that these children outscored their mothers by 20 points or more. In fact, at least one third of the children's a dvantage is an artifact of the 1916 Stanford-Binet test norms plus obs olescence. The mother-child IQ gap is estimated at 13 points with a lo wer limit of 10 points. The children's mean IQ is put at 105.5, but th is is a very rough estimate and the value could easily be as high as 1 10.