Table 2.
Convergent and discriminant validity of the NIHTB pattern comparison processing speed test
| NIHTB Pattern Comparison Processing Speed Test |
|||||
|---|---|---|---|---|---|
| Ages 3–7 r (df) | Ages 8–12 r (df) | Ages13–19 r (df) | Ages 20–59 r (df) | Ages 60–85 r (df) | |
| Convergent validity measures | |||||
| NIHTB DCCS/Flanker Processing Speed | 0.48 (731)** | 0.62 (847)** | 0.55 (874)** | 0.65 (875)** | 0.65 (259)** |
| NIHTB Oral Symbol Digit | — | −0.42 (270)** | −0.26 (306)** | −0.45 (246)** | −0.39 (110)** |
| Discriminant validity measures | |||||
| Working memory | |||||
| NIHTB List Sorting | 0.38 (845)** | 0.26 (1,099)** | 0.20 (1,135)** | 0.33 (992)** | 0.39 (398)** |
| Verbal functioning | |||||
| NIHTB Vocabulary Comprehension | 0.36 (490)** | 0.38 (846)** | 0.20 (871)** | 0.17 (696)** | 0.29 (235)** |
| NIHTB Reading Decoding | 0.43 (582)** | 0.30 (1,102)** | 0.21 (1,127)** | 0.03 (770) | 0.17 (325)* |
Notes: NIHTB = National Institutes of Health Toolbox; unadjusted scaled scores were utilized in analyses; **p < .0001; *p < .05.