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Population
| Young group | Middle-aged group | Older group | |
|---|---|---|---|
| Number | 29 | 20 | 23 |
| Women/men | 14/15 | 13/7 | 13/10 |
| Age: mean ± SD | 24.3 ± 4.5 | 51 ± 7 | 68.2 ± 6.7 |
| (age range) | (18 – 35) | (40 – 59) | (60 – 84) |
| Educational background: mean ± SD | 13.8 ± 1.8 | 11.5 ± 3.8 | 11.7 ± 2.7 |
| (educational range) | (12 – 20) | (8 – 20) | (8 – 17) |
| Vocabulary score (Mill Hill/44) | 32.3 ± 4.1 | 33.5 ± 5.5 | 36.4 ± 4.8 |
SD: standard deviation
