Figure 1.
A non-target (R) and a target (X) trial of the simple choice RT task.
Figure 2.
Target stimuli of the complex choice RT task conditions.
On the left matrix, four Xs appear in a row (easy or hard conditions); on the right matrix, four Os appear in a row (hard condition).
Table 1.
Means (and standard deviations) of younger and older adults across all tasks.
Figure 3.
Dual task costs for the choice RT tasks.
E–E = Easy choice RT with easy digit; E–H = Easy choice RT with hard digit; H–E = Hard choice RT with easy digit; H–H = Hard choice RT with hard digit. Standard error bars are included.
Figure 4.
Dual task costs for the digit tasks.
E–E = Easy digit with easy choice RT; E–H = Easy digit with hard choice RT; H–E = Hard digit with easy choice RT; H–H = Hard digit with hard choice RT. Standard error bars are included.
Figure 5.
Main effect of Age (young, old) on reaction times of the simple choice RT task.
Standard error bars are included.
Figure 6.
Percentage of error rates on the Simple Choice RT (easy, hard) as a function of Digit Forward Task Difficulty (none, easy, hard).
E = Easy; H = Hard. Standard error bars are included.
Figure 7.
Dual task costs (error rates) on the Simple Choice RT Task Difficulty (easy, hard) as a function of Age (young, old).
E = Easy; H = Hard. Standard error bars are included.
Figure 8.
Reaction times on the Complex Choice RT (easy, hard) as a function of Digit Backward Task Difficulty (none, easy hard).
E = Easy; H = Hard. Standard error bars are included.
Figure 9.
Main effect of Age (young, old) on error rates of the complex choice RT task.
Standard error bars are included.
Figure 10.
Dual task costs (error rates) on the Complex Choice RT Task Difficulty (easy, hard) as a function of Age (young, old).
E = Easy; H = Hard. Standard error bars are included.