VQ .72 20.54 102.52 ±.05 ±1.41 ±2.00 RQ .64 .64 19.09 95.90 ±.06 ±.06 ±1.31 ±1.86 CQ .63 .71 .77 19.34 99.44 ±.06 ±.05 ±.04 ±1.33 ±1.88 JUNE, 1919 IQ VQ RQ S.D. M IQ 19.12 105.15 ±1.32 ±1.86 VQ .73 20.80 113.54 ±.05 ±1.43 ±2.02 RQ .65 .58 14.73 101.31 ±.06 ±.06 ±1.01 ±1.43 CQ .62 .68 .77 19.76 101.04 ±.06 ±.05 +.04 ±1.36 ±1.92 NOVEMBER, 1919 IQ AQ VQ RQ S.D. M IQ 19.12 105.15 ±1.32 ±1.86 AQ .46 14.08 102.90 ±.08 ±0.97 ±1.37 VQ .86 .23 17.07 109.17 ±.03 ±.09 ±1.18 ±1.66 RQ .65 .56 .71 13.91 101.42 ±.06 ±.07 ±.05 ±0.96 ±1.35 CQ .79 .47 .83 .82 17.53 105.21 ±.04 ±.08 ±.03 ±.03 ±1.21 ±1.71 JUNE, 1920 IQ AQ VQ RQ S.D. M IQ 19.12 105.15 ±1.32 ±1.86 AQ .73 14.10 101.79 ±.05 ±0.97 ±1.37 VQ .81 .60 18.89 108.94 ±.03 ±.06 ±1.30 ±1.84 RQ .79 .68 .87 16.43 104.94 ±.04 ±.05 ±.02 ±1.13 ±1.60 CQ .84 .77 .78 .84 15.87 108.08 ±.03 ±.04 ±.04 ±.03 ±1.09 ±1.54 TABLE 4 RELIABILITY COEFFICIENTS One Form Two Forms One Form Two Forms of Each of Each with an with an Test Test (by Infinite Infinite Brown’s Number Number Formula) of Forms of Forms _r_₁₁ _r_₁₁ √_r_₁₁ √_r_₁₁ Intelligence Quotient .888 .942 (by Brown’s Formula)[13] Arithmetic Quotient .824 .904 .908 .951 Vocabulary Quotient .820 .901 .906 .949 Reading Quotient .866 .928 .931 .963 Completion Quotient .883 .938 .940 .968 Limits of the _r_’s = ∜(_r_₁₁ × _r_₂₂)