Table 1.
Standardized scores on IQ, math and reading achievement and working memory for 2nd and 3rd grade children.
| Grade | ||||||
|---|---|---|---|---|---|---|
| 2nd (N = 45) | 3rd (N = 45) | t | p | |||
| Measure | M | SD | M | SD | ||
| Males/Females | 30/15 | 21/24 | ||||
|
| ||||||
| Age (years) | 7.67 | 0.40 | 8.67 | 0.40 | -12.134 | <0.001 |
|
| ||||||
| WASI | ||||||
| Verbal IQ | 111.07 | 14.22 | 109.89 | 10.06 | 0.454 | 0.651 |
| Performance IQ | 110.04 | 12.83 | 108.53 | 11.97 | 0.578 | 0.565 |
| Full Scale IQ | 111.82 | 10.96 | 110.58 | 9.29 | 0.581 | 0.563 |
|
| ||||||
| WIAT-II | ||||||
| Word Reading | 109.84 | 12.99 | 107.91 | 10.51 | 0.776 | 0.440 |
| Reading Comprehension | 106.49 | 11.13 | 106.78 | 10.10 | -0.129 | 0.898 |
| Numerical Operations | 102.56 | 14.42 | 103.93 | 13.75 | -0.464 | 0.644 |
| Mathematical Reasoning | 109.24 | 9.33 | 108.53 | 10.07 | 0.348 | 0.729 |
|
| ||||||
| WMTB-C | ||||||
| Digit Recall | 107.38 | 19.63 | 106.07 | 21.49 | 0.302 | 0.763 |
| Block Recall | 93.49 | 15.11 | 94.58 | 11.68 | -0.382 | 0.703 |
| Counting Recall | 92.18 | 15.86 | 88.69 | 23.87 | 0.817 | 0.416 |
| Backward Digit Recall | 94.56 | 16.19 | 98.89 | 15.44 | -1.299 | 0.197 |
WASI = Wechsler Abbreviated Scales of Intelligence, WIAT-II = Wechsler Individual Achievement Test – Second Edition, WMTB-C = Working Memory Test Battery for Children.