Table 3.
Test-retest reliability and practice effects (mean interval 15.03 months, SD = 3.11)
| Cognitive Test Batteries | r | CCC (95% CI) | Time 1 Mean ± SD |
Time 2 Mean ± SD |
t value |
p value | Cohen’s d |
|---|---|---|---|---|---|---|---|
| NIHTB-CB Fluid Cognition Composite (n =36) | .73*** | .73 (.53, .85) | 110.57 ± 14.27 | 110.08 ± 13.75 | −0.49 | .630 | −0.04 |
| Dimensional Card Sort (n = 36) | .58*** | .54 (.28, .72) | 108.05 ± 9.64 | 111.27 ± 9.57 | 2.40 | .022 | 0.33 |
| Flanker Inhibitory Control | .62*** | .54 (.31, .72) | 106.62 ± 11.00 | 102.53 ± 8.17 | −2.83 | .008 | −0.37 |
| Picture Sequencing Memory | .74*** | .74 (.55, .85) | 114.38 ± 22.07 | 113.49 ± 20.26 | −0.37 | .717 | −0.04 |
| List Sorting Working Memory | .46** | .46 (.17, .68) | 112.84 ± 11.11 | 112.89 ± 10.21 | −0.02 | .985 | 0.00 |
| Pattern Comparison Processing Speed | .61*** | .61 (.36, .78) | 99.38 ± 16.99 | 98.48 ± 18.44 | −0.34 | .734 | −0.05 |
| NIHTB-CB Crystallized Cognition Composite | .92*** | .92 (.86, .96) | 125.76 ± 15.66 | 126.32 ± 15.89 | 0.55 | .583 | 0.04 |
| Picture Vocabulary | .88*** | .87 (.77, .93) | 125.05 ± 15.91 | 127.07 ± 16.06 | 1.59 | .121 | 0.13 |
| Oral Reading Recognition | .85*** | .85 (.73, .92) | 115.35 ± 11.66 | 114.54 ± 12.08 | −0.76 | .451 | −0.07 |
| GS Fluid Cognition Composite | .92*** | .85 (.74, .91) | 109.35 ± 10.30 | 113.23 ± 9.82 | 5.71 | .000 | 0.38 |
| Trail Making Test – Part B | .59*** | .54 (.29, .72) | 110.22 ± 12.42 | 115.57 ± 13.40 | 2.77 | .009 | 0.43 |
| Stroop Color Word | .87*** | .86 (.74, .92) | 106.62 ± 11.00 | 109.59 ± 15.06 | 2.23 | .032 | 0.27 |
| RAVLT (total learning) | .80*** | .78 (.62, .88) | 106.73 ± 15.72 | 111.65 ± 16.41 | 1.58 | .122 | 0.31 |
| WMS-R Digit Span | .67*** | .65 (.42, .80) | 108.68 ± 18.99 | 112.46 ± 13.36 | 1.96 | .058 | 0.20 |
| WAIS-III Digit Symbol | .86*** | .77 (.63, .86) | 109.03 ± 12.93 | 116.84 ± 10.20 | 4.07 | .000 | 0.60 |
| GS Crystallized Cognition Composite(AmNART) | .93*** | .93 (.86, .96) | 116.76 ± 15.79 | 115.62 ± 15.85 | 1.17 | .251 | −0.07 |
Notes. CCC = concordance correlation coefficient. p values reflect significance of two-tailed t-tests for differences in paired means. Magnitudes of practice effects are shown with Cohen’s d effect sizes, with values in bold representing significantly higher scores at follow-up (alpha > .05). n = 37 unless stated otherwise. All values reflect age-adjusted standard scores (M=100, SD=15).
*
p < .05;
**
p < .01;
***
p < .001.