In regard to the borderline for the mature with the Stanford scale it is especially important to note that at present no randomly selected mature group has been tested with this scale so that we are at a loss to know what would be a safe borderline for adults with it. It is peculiarly unsafe, it seems to me, to carry over an intelligence quotient which may shut out the lowest 1% of children who distribute normally, to the uncertain borderline of an adult group composed of thirty business men, 150 migrating unemployed, 150 adolescent delinquents and 50 high school students. By these data it would be impossible to tell what per cent. of a random group of adults would be shut out by this borderline of 70. TABLE VII.—BORDERLINE RESULTS WITH THE POINT SCALE The lower range of “intelligence coefficients” for the normal group of school children and adults (226, Table III). ───────────────┬───────┬───────┬───────┬───────┬───────┬───────┬─────── Nearest Ages │ 4-5 │ 6-7 │ 8-9 │ 10-11 │ 12-13 │ 14-15 │ 18-on ───────────────┼───────┼───────┼───────┼───────┼───────┼───────┼─────── No. of Cases │ 84 │ 357 │ 196 │ 161 │ 120 │ 77 │ 284 ───────────────┼───────┼───────┼───────┼───────┼───────┼───────┼─────── Presumably │ │ Under │ │ Under │ │ │ Under deficient │ │ .61 │ │ .61 │ │ │ .61 │ │ 0.4% │ │ 0.6% │ │ │ 0.7% ───────────────┼───────┼───────┼───────┼───────┼───────┼───────┼─────── Doubtful │ Under │.61 to │ Under │.61 to │ Under │ Under │.61 to │ .51 │ .81 │ .51 │ .71 │ .51 │ .61 │ .71 ───────────────┼───────┼───────┼───────┼───────┼───────┼───────┼─────── Both │(4.8%) │ 1.5% │ 1.5% │(5.0%) │ 1.7% │ 1.3% │(6.3%) ───────────────┴───────┴───────┴───────┴───────┴───────┴───────┴─────── Pupils of Grammar School B, Cambridge, Mass. (225, Table III) ───────────────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬────── Ages │ 6 │ 7 │ 8 │ 9 │ 10 │ 11 │ 12 │ 13 ───────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼────── No. of Pupils │ 71 │ 73 │ 61 │ 71 │ 76 │ 79 │ 60 │ 52 ───────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼────── Per Cent of │ 1.4 │ 1.4 │ 1.5 │ 2.7 │ 1.3 │ 1.3 │ 1.7 │ 2.0 Pupils at │ │ │ │ │ │ │ │ and Below │ 11 │ 14 │ 15 │ 21 │ 35 │ 40 │ 33 │ 38 Points │ │ │ │ │ │ │ │ ───────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────