Table 3: Adjusted means (95% confidence intervals) for dual-task effects on reaction time (DTErt) and accuracy (DTEacc) for each cognitive task as a function of gait task. Positive values indicate a dual-task benefit relative to single-task; negative values indicate a dual-task cost relative to single-task performance. None of the main effects or interactions in the ANCOVA were significant for DTErt or DTEacc.

DTErt (%)DTEacc (%)
Self-selectedFast comfortableFast obstacleSelf-selectedFast comfortableFast obstacle

Stroop
 Young−7.6 (−14.8, −0.4)−0.5 (−8.1, 7.2)−1.0 (−8.7, 6.6)−0.1 (−6.0, 5.7)−0.7 (−5.9, 4.6)−0.5 (−5.4, 4.4)
 Older−3.7 (−12.4, 5.0)−5.2 (−14.5, 4.0)−4.2 (−13.4, 5.1)−0.4 (−7.4, 6.7)−1.2 (−7.5, 5.2)0.2 (−5.6, 6.1)
Clock
 Young4.7 (−3.0, 12.5)18.4 (11.2, 25.7)11.3 (3.8, 18.7)−1.6 (−9.7, 6.6)0.4 (−10.7, 11.5)−1.8 (−9.4, 5.8)
 Older14.5 (5.1, 23.9)14.7 (5.9, 23.5)12.9 (3.8, 21.9)−4.6 (−14.4, 5.3)−2.4 (−15.9, 11.0)−11.3 (−20.6, −2.1)