| Description | Z Score | Percentile | IQ/Standard Score | Subscale Score |
| Very Superior | +2.0 | 99 98 98 98 | 133 or more 132 131 130 | 19 18 17 |
| Superior | +1.6 +1.3 | 97 97 96 96 95 95 94 93 92 91 | 129 128 127 126 125 124 123 122 121 120 | 16 15 |
| High Average | +1.0 +0.6 | 90 88 87 86 84 83 81 79 77 75 | 119 118 117 116 115 114 113 112 111 110 | 14 13 12 |
| Average | +0.3 0.0 -0.3 -0.6 | 73 70 68 66 63 60 58 55 53 50 47 45 42 40 37 34 32 30 27 25 | 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 | 11 10 9 |
| Low Average Mildly Impaired Mild Deficiencies | -1.0 -1.3 | 23 21 19 17 16 14 13 12 10 9 | 89 88 87 86 85 84 83 82 81 80 | 8 7 |
| Borderline Moderately Impaired Moderate Deficiencies | -1.6 -2.0 | 8 7 6 5 5 4 4 3 3 2 | 79 78 77 76 75 74 73 72 71 70 | 6 5 |
| Severely Impaired Seriously Deficient | | 2 2 1 | 69 68 67 or less | 4 or less |