Table 2.
Means (M) and Standard Deviations (SD) of Standard Scores for Age on WIAT II Standard Scores for Reading Comprehension, Written Expression, Oral Expression, and Listening Comprehension across Longitudinal Study
| Standard Score | |||||
|---|---|---|---|---|---|
| Younger Cohort | Older Cohort | ||||
| M (SD) | M (SD) | ||||
| Listening Comprehension | |||||
| Grade 1 | 109.52 | (12.22) | Grade 3 | 112.58 | (10.84) |
| Grade 3 | 113.69 | (13.90) | Grade 5 | 116.16 | (12.76) |
| Grade 5 | 117.50 | (12.19) | Grade 7 | 115.09 | (11.00) |
| Oral Expression | |||||
| Grade 1 | 108.81 | (12.01) | Grade 3 | 113.00 | (12.49) |
| Grade 3 | 113.56 | (13.07) | Grade 5 | 118.60 | (14.48) |
| Grade 5 | 119.22 | (12.94) | Grade 7 | 123.62 | (14.98) |
| Reading comprehension | |||||
| Grade 1 | 107.30 | (15.74) | Grade 3 | 115.85 | (11.66) |
| Grade 3 | 114.38 | (14.22) | Grade 5 | 115.93 | (9.45) |
| Grade 5 | 115.94 | (8.30) | Grade 7 | 115.52 | (7.28) |
| Written Expression | |||||
| Grade 1 | 98.69 | (14.34) | Grade 3 | 112.09 | (13.37) |
| Grade 3 | 111.37 | (15.20) | Grade 5 | 112.19 | (14.38) |
| Grade 5 | 107.78 | (12.41) | Grade 7 | 111.40 | (13.84) |