Table 1: Characteristics (mean, SD) of sample.

Variable Young adults () Older adults () Age 21.7 (1.6) 72.1 (5.2) <.001 Female gender (number, %) 18 (90%) 12 (80%) .418 Education (years) 15.3 (0.7) 12.4 (2.0) <.001 MMSEa (max. 30) 28.6 (1.1) 27.5 (2.2) .080 Activities-specific balance confidence scale (max. 100) 95.8 (4.9) 85.9 (10.9) .004 Digit symbol copy (time in seconds to complete) 57.4 (6.9) 84.1 (21.0) .001 Digit symbol substitution (number correct in 90 seconds) 74.2 (9.1) 46.1 (13.2) <.001 Stroop color-word interferenceb 24.1 (7.5) 35.8 (13.0) .005 Comprehensive trail-making test interferencec (seconds) 13.8 (9.7) 35.1 (24.8) .006 TUG (seconds) 7.4 (0.7) 9.6 (2.4) .003

-test for independent samples. Abbreviations: MMSE: Mini Mental State Examination; TUG: Timed Up and Go test; value is for -test comparing young and older adults. aMMSE measures global cognitive function; Digit symbol modalities test measures speed of processing and attention; Stroop and Trail Making Tests measure executive function; TUG measures balance during functional performance. bStroop interference score calculated as difference in number correct between baseline condition and interference condition. cTrail-making test interference score calculated as difference in time (seconds) between time to complete Trail 5 and Trail 1.