Table 4.
Mean percentages of correct PM responses (standard deviations) in young and older adults as a function of laboratory PM task (pencil, token, and stop-clock) and naturalistic PM task (event-based bus and post box, time-based 1-day delay and 3-day delay)
| PM task | Age group | |
|---|---|---|
| Young | Old | |
| M (SD) | M (SD) | |
| Laboratory tasks | ||
| Event-based (pencil) | 91.40 (17.14) | 54.55 (34.95) |
| Event-based (token) | 88.17 (23.65) | 56.06 (36.20) |
| Time-based (stop-clock) | 75.81 (36.22) | 77.27 (36.93) |
| Naturalistic tasks | ||
| Event-based (bus, post box) | 82.26 (24.32) | 93.18 (17.56) |
| Time-based 1-day delay | 56.45 (40.30) | 81.82 (32.90) |
| Time-based 3-day delay | 69.35 (33.36) | 79.55 (29.52) |