## Sensitivity and Specificity

Table 3.4. Sensitivity and specificity levels by age for all ages tested by the TILLS

| Age groups          | Sensitivity | Specificity |
|---------------------|-------------|-------------|
| 6-year-olds         | 84%         | 82%         |
| 7-year-olds         | 84%         | 86%         |
| 8-year-olds         | 97%         | 100%        |
| 9-year-olds         | 83%         | 81%         |
| 10-year-olds        | 81%         | 81%         |
| 11-year-olds        | 86%         | 82%         |
| 12-year-olds        | 83%         | 100%        |
| 13-year-olds        | 84%         | 86%         |
| 14- to 18-year-olds | 87%         | 87%         |

Note the TILLS does not include separate age norms between the ages of 14 and 18 years. This is because the skills tapped by the TILLS no longer show age-related change after age 13 years.

Excerpted from the TILLS™ Examiner’s Manual, and the Test of Integrated Language and Literacy Skills™ (TILLS™)
by Nickola Wolf Nelson, Ph.D., Elena Plante, Ph.D., Nancy Helm-Estabrooks, Sc.D., and Gillian Hotz, Ph.D. Copyright © 2015 by Paul H. Brookes Publishing Co. All rights reserved.