Table 2.
Reliabilities and variances of cognitive changes
| Age Group | ||||||
|---|---|---|---|---|---|---|
| 18-44 | 45-69 | 70-92 | ||||
| Estimated reliabilities of change | ||||||
| T1-T2 | Rel. | T1-T2 | Rel. | T1-T2 | Rel. | |
| Word Recall | .64 | .18 | .60 | .17 | .65 | .18 |
| Paired Associates | .64 | .19 | .65 | −.01 | .51 | .17 |
| Logical Memory | .68 | .05 | .63 | .19 | .58 | .31 |
| Digit Symbol | .73 | −.43 | .80 | −.82 | .72 | −.32 |
| Pattern Comparison | .61 | .44 | .56 | .31 | .68 | .37 |
| Letter Comparison | .70 | .07 | .67 | −.12 | .73 | .11 |
| Variance of latent changes | ||||||
| Mean (SE) | Mean (SE) | Mean (SE) | ||||
| Word Recall | .06 (.02) | .04 (.01) | .07 (.03) | |||
| Paired Associates | .09 (.02) | .02 (.01) | .02 (.02) | |||
| Logical Memory | .03 (.02) | .03 (.01) | .11 (.03) | |||
| Digit Symbol | .13 (.03) | .10 (.02) | .14 (.03) | |||
| Pattern Comparison | .18 (.04) | .13 (.02) | .11 (.02) | |||
| Letter Comparison | .16 (.03) | .10 (.02) | .08 (.02) | |||
Note: T1-T2 refers to the (stability) correlation of the score on the first test version on each occasion across the retest interval. Rel. is the estimate of reliability computed by subtracting the T1-T2 correlation from the T21-T22 correlation, and dividing the difference by 1 minus the T1-T2 correlation. Variances of latent changes are derived from the latent change model portrayed in Figure 1.