Table 4.
Results from the MTB Spelling Validation Studies
| Study 1 | Study 2 | Study 3 | ||||
|---|---|---|---|---|---|---|
| Value | N | Value | N | Value | N | |
| MTB Spelling Theta Score Mean (SD) | ||||||
| Total Sample | — | — | 0.24 (0.72) | 977 | — | — |
| iOS Time 1 Theta | 0.05 (0.81) | 92 | 0.24 (0.71) | 627 | 0.71 (0.73) | 132 |
| iOS Time 2 Theta | — | — | — | — | 0.65 (0.76) | 132 |
| Android | — | — | 0.24 (0.75) | 350 | — | — |
| Empirical Reliability | ||||||
| Total Sample | — | — | 0.79 | 977 | — | — |
| iOS | 0.83 | 92 | 0.78 | 627 | — | |
| Android | — | — | 0.8 | 350 | — | — |
| Person-Specific Reliability | ||||||
| Total Sample | — | — | 0.86 | 977 | — | — |
| iOS | 0.86 | 92 | 0.86 | 627 | — | |
| Android | — | — | 0.86 | 350 | — | — |
| Test-Retest Reliability | — | — | — | — | 0.63 | 132 |
| Correlations | ||||||
| Age | −.06 | 92 | −.04 | 977 | — | |
| Education | .27** | 977 | — | |||
| External Battery (Convergent) | ||||||
| WIAT-4 Spelling Subtest | .81** | 69 | — | — | — | — |
| NIHTB V3 Oral Reading Recognition | .67** | 92 | .56** | 968 | — | — |
| External Battery (Divergent) | ||||||
| NIHTB V3 Visual Reasoning | .36** | 92 | .25** | 967 | — | — |
| NIHTB V3 RAVLT Immediate | .33** | 92 | .23** | 961 | — | — |
| NIHTB V3 RAVLT Delayed | .22 | 83 | .14** | 905 | — | — |
Notes: *p < .01; **p < .001