Table 2.
Estimates of first occasion reliability (Rel), stability correlation between the first and third occasion (r13), and reliability of the difference between the first and third occasion (D13Rel) for individual variables, composite variables, and latent variables in three age groups
| Age 18–39 | Age 40–64 | Age 65–99 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Rel | r13 | D13Rel | Rel | r13 | D13Rel | Rel | r13 | D13Rel | |
| Memory | |||||||||
| Recall | .64 | .66 | −.06 | .78 | .55 | .51 | .79 | .51 | .57 |
| Paired Associates | .71 | .71 | .00 | .73 | .61 | .31 | .78 | .61 | .44 |
| Logical Memory | .79 | .68 | .34 | .79 | .61 | .46 | .72 | .54 | .39 |
| Composite | .84 | .81 | .16 | .86 | .71 | .52 | .86 | .68 | .56 |
| Latent variable | .99 | .89 | .91 | .97 | .85 | .80 | .96 | .73 | .85 |
| Speed | |||||||||
| Digit Symbol | .85 | .81 | .21 | .88 | .74 | .54 | .87 | .68 | .59 |
| Pattern Comparison | .88 | .59 | .71 | .71 | .52 | .40 | .80 | .60 | .50 |
| Letter Comparison | .80 | .63 | .46 | .78 | .59 | .46 | .85 | .59 | .63 |
| Composite | .92 | .77 | .65 | .88 | .74 | .54 | .91 | .69 | .71 |
| Latent variable | 1.00 | .89 | 1.00 | .96 | .85 | .73 | .95 | .81 | .74 |
| Vocabulary | |||||||||
| Definition | .90 | .84 | .38 | .91 | .74 | .65 | .85 | .57 | .65 |
| Picture | .96 | .90 | .60 | .91 | .86 | .36 | .92 | .69 | .74 |
| Synonym | .86 | .78 | .36 | .84 | .85 | −.07 | .85 | .69 | .52 |
| Antonym | .89 | .72 | .61 | .81 | .79 | .10 | .77 | .70 | .23 |
| Composite | .96 | .92 | .50 | .94 | .92 | .25 | .95 | .79 | .76 |
| Latent variable | .99 | .98 | .50 | .99 | .98 | .50 | 1.00 | .90 | 1.00 |
| Reasoning | |||||||||
| Matrix Reasoning | .83 | .75 | .32 | .75 | .66 | .26 | .62 | .64 | −.06 |
| Shipley | .83 | .82 | .06 | .87 | .80 | .35 | .78 | .70 | .27 |
| Letter Sets | .76 | .71 | .17 | .83 | .65 | .51 | .69 | .65 | .11 |
| Composite | .89 | .87 | .15 | .91 | .86 | .36 | .84 | .82 | .11 |
| Latent variable | .96 | .93 | .43 | .97 | .95 | .40 | .97 | .94 | .50 |
| Space | |||||||||
| Spatial Relations | .74 | .88 | −1.17 | .82 | .81 | .05 | .81 | .71 | .34 |
| Paper Folding | .79 | .78 | .05 | .72 | .65 | .20 | .65 | .54 | .24 |
| Form Boards | .84 | .76 | .33 | .77 | .62 | .39 | .59 | .59 | .00 |
| Composite | .91 | .89 | .18 | .89 | .84 | .31 | .82 | .75 | .28 |
| Latent variable | 1.00 | .95 | 1.00 | 1.00 | .95 | 1.00 | .95 | .87 | .62 |
| Medians | |||||||||
| Individual Variables | .83 | .76 | .33 | .80 | .66 | .38 | .79 | .63 | .41 |
| Composite Variables | .91 | .87 | .18 | .89 | .84 | .36 | .86 | .75 | .56 |
| Latent Variables | .99 | .93 | .91 | .97 | .95 | .73 | .96 | .87 | .74 |
Note: Rel. refers to test-retest reliability over a period of about 1 week with data from Salthouse and Tucker-Drob (2008), r13 is the (stability) correlation between scores on the first and third longitudinal occasion, and D13Rel is estimated reliability of the difference between the T1 and T3 scores as computed from [(Rel. − r13)/(1−r13)].