Research Article
A Brief Report on the Factor Structure of the Cognitive Measures in the HRS/AHEAD Studies
Table 3
Correlations among cognitive measures.
| Variable | 1 | 2 | 3 | 4 | 5 |
| (1) Immediate recall | — | | | | | (2) Delayed recall | 0.76** | — | | | | (3) Serial 7s | 0.27** | 0.27** | — | | | (4) Backward counting | 0.08 | 0.09 | 0.06 | — | | (5) Dates | 0.26** | 0.33** | 0.26** | 0.13* | — | (6) Names | 0.20** | 0.27** | 0.36** | 0.21** | 0.33** |
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