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Table 23. Performance of youth with mental retardation compared with performance of youth in the general population based on standard scores from the Woodcock-Johnson III research version direct assessment subtests
| <70 | 70–84.9 | 85–100 | >100 | |
|---|---|---|---|---|
| Percentage with standard score | ||||
| Youth in general population1 | ||||
| All subtests | 2 | 14 | 34 | 50 |
| Youth with mental retardation | ||||
| Passage comprehension | 73 | 24 | 3 | 1 |
| Synonyms/antonyms | 59 | 30 | 11 | 0.3 |
| Mathematical calculation | 65 | 26 | 7 | 1 |
| Applied problems | 57 | 30 | 13 | 1 |
| Social Studies | 56 | 39 | 5 | 0.3 |
| Science | 48 | 38 | 14 | 1 |
| 1 Youth in the general population refers to the Woodcock-Johnson norming sample. NOTE: Percentages are population estimates based on weighted samples that range from approximately 460 to 480 youth across variables. SOURCE: Woodock-Johnson, Test of Cognitive Ability: Standard and Supplemental Batteries. Norm Tables, 1989; U.S. Department of Education, Institute of Education Sciences, National Center for Special Education Research, National Longitudinal Transition Study-2 (NLTS2), Wave 1 student's school program survey, 2002. | ||||