There is no series of tests which has been employed outside the field of delinquency which diagnoses the borderline cases objectively so well as the Binet scale. The tests of Weyandt (_219_), Rossolimo (_175_), Rybakow (_176_), and Knox (_134_) are without definable limits based on unselected groups. Those employed by Dr. Norsworthy, while scientifically better scored for describing the borderline, were not arranged with this in view (_160_). Carpenter has published norms obtained with Squire's tests on 50 pupils of each age from 7 to 14. Single tests like the form board (_87_), Knox's cube test (_134_), the substitution test (_1_), and the A test (_160_) have been tried with delinquent or feeble-minded groups as well as with normal people. Under the direction of the New York Board of Charities an excellent beginning has been made in determining norms for eleven different tests (_158_). Stenquist, Thorndike and Trabue (_54_) have furnished developmental norms for several tests. Gilbert (_108_) and Smedley (_51_) at an earlier date provided age norms and deviations for certain tests. Mrs. Woolley has provided the percentile distribution for a series of mental and physical tests with 14-and 15-year-old children leaving the public schools to go to work (_222_) (_223_). In England a goodly number of different tests have been tried out on small groups or on children of particular ages (_84_) (_63_) (_224_). Pyle has obtained norms and variations with a series of group tests. It approaches nearest to the Binet as a developmental scale for the immature, but these tests have not been tried as individual tests and so could hardly be used safely for individual diagnosis. A graphic summary of the developmental curves for most of these tests on children will be found in Chapter XIII.