Table 1.
Mean (SE) of Latencies (ms) as a Function of Block Type, Age Group, Task-sequencing Load, and Verbalization Condition for the Control Condition First Group.
| High task-sequencing load (1 Grid) | |||
|---|---|---|---|
| Task naming | Control | Verbalization benefits | |
| YOUNG | |||
| Single blocks | 399 (21) | 431 (28) | −32 (18) |
| Mixed blocks | 463 (29) | 591 (48) | −128 (27) |
| Mixing costs | 64 (13) | 161 (27) | −97 (22) |
| OLD | |||
| Single blocks | 594 (39) | 580 (33) | 14 (20) |
| Mixed blocks | 648 (41) | 929 (75) | −281 (46) |
| Mixing costs | 54 (23) | 349 (53) | −294 (55) |
| Low task-sequencing load (2 Grids) | |||
| Task naming | Control | Verbalization benefits | |
| YOUNG | |||
| Single blocks | 431 (23) | 478 (24) | −47 (17) |
| Mixed blocks | 488 (30) | 600 (38) | −112 (28) |
| Mixing costs | 57 (14) | 122 (28) | −65 (27) |
| OLD | |||
| Single blocks | 661 (65) | 645 (48) | 16 (55) |
| Mixed blocks | 769 (83) | 962 (105) | −193 (52) |
| Mixing costs | 109 (30) | 317 (88) | −209 (82) |
Mixing costs = RT mixed blocks − RT single blocks; Verbalization benefits = RT task naming − RT control condition.