Table 1.
Means and standard deviations of participants’ demographic information and results from perceptual and cognitive tests.
| Variable | Younger |
Older |
||
|---|---|---|---|---|
| M | SD | M | SD | |
| Age (years)a | 23.0 | 1.4 | 73.3 | 4.1 |
| Years of educationa | 14.5 | 1.2 | 19.4 | 3.2 |
| Snellen letter acuity | 10/11.1 | 1.5 | 10/14.1 | 2.5 |
| Log contrast sensitivitya,b | 1.69 | 0.13 | 1.52 | 0.22 |
| Digit span forward | 11.3 | 2.1 | 9.9 | 1.9 |
| Digit span backward | 8.9 | 1.7 | 7.2 | 1.6 |
| Perceptual encoding manuala | 88.8 | 17.8 | 70.7 | 18.3 |
| Kaufman brief intelligence test | 25.5 | 4.1 | 28.7 | 5.8 |
aDifferences between age groups were significant (p ≤ 0.05). bContrast sensitivity was measured using the Pelli Robson test (Pelli et al., 1988).