Table 1.
(A) Analysis including all participants (24 young adults, 24 older adults). | |||||||||
---|---|---|---|---|---|---|---|---|---|
Dependent measure | Main effect Age Group | Main effect Task Sequence | Interaction Task Sequence × Age Group | ||||||
F(1, 46) | p | F(1, 46) | p | F(1, 46) | p | ||||
MEAN PERFORMANCE | |||||||||
RT | 56.72 | <0.05 | 0.55 | 22.22 | <0.05 | 0.33 | <1.0 | n.s. | |
Log RT | 94.75 | <0.05 | 0.67 | 29.21 | <0.05 | 0.39 | <1.2 | n.s. | |
Error Rates | 4.14 | <0.05 | 0.08 | 8.42 | <0.05 | 0.16 | <1.0 | n.s. | |
DIFFUSION MODEL PARAMETERS | |||||||||
a | 7.38 | <0.05 | 0.14 | 6.05 | <0.05 | 0.12 | 2.42 | = 0.13 | 0.05 |
ν | <1.0 | n.s. | 9.11 | <0.05 | 0.17 | 2.68 | = 0.11 | 0.06 | |
t0 | 116.38 | <0.05 | 0.72 | 4.61 | <0.05 | 0.09 | <1.0 | n.s. | |
st0 | 25.15 | <0.05 | 0.35 | <1.0 | n.s. | <1.0 | n.s. | ||
(B) Analysis including only participants with non-outlying task inhibition effects in model parameters (22 young adults, 18 older adults). | |||||||||
Dependent measure | Main effect Age Group | Main effect Task Sequence | Interaction Task Sequence × Age Group | ||||||
F(1, 38) | p | F(1, 38) | p | F(1, 38) | p | ||||
MEAN PERFORMANCE | |||||||||
RT | 75.49 | <0.05 | 0.67 | 18.10 | <0.05 | 0.32 | <1.0 | n.s. | |
Log RT | 102.33 | <0.05 | 0.73 | 21.75 | <0.05 | 0.36 | <1.0 | n.s. | |
Error Rates | 4.59 | <0.05 | 0.11 | 8.76 | <0.05 | 0.19 | <1.0 | n.s. | |
DIFFUSION MODEL PARAMETERS | |||||||||
a | 6.45 | <0.05 | 0.15 | 8.87 | <0.05 | 0.19 | 5.11 | <0.05 | 0.12 |
ν | <1.0 | n.s. | 16.21 | <0.05 | 0.30 | 3.78 | = 0.06 | 0.09 | |
t0 | 92.48 | <0.05 | 0.71 | 11.14 | <0.05 | 0.23 | 5.93 | <0.05 | 0.14 |
st0 | 23.46 | <0.05 | 0.38 | <1.0 | n.s. | <1.0 | n.s. |