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Williams, Phillip; Gruber, Elisabeth – 1968
To differentiate between educationally subnormal students who do and who do not respond well to special school education, 161 children attending special classes in South Wales were studies. The first (the E-) group consisted of 47 children (mean IQ 55) found unsuitable for special school education. The second (the S-) group included 57 children…
Descriptors: Achievement, Child Development, Children, Environmental Influences