Article

The aim of this study was to develop alternate forms of the walking while talking
(WWT) dual task, and to determine whether beginning the WWT in mid-alphabet vs.
at the beginning of the alphabet, affects task outcomes. Alternate test forms
help reduce practice effects leading to more precise estimates of change over
time. We conducted a cross-sectional study in 145 community-residing older adults
(mean age, 79.2 +/- 6.8 y) without dementia or depression. Subjects performed
four WWT trials with a different initial letter (a, b, m or n). There were no
differences in velocity, correct letters, or errors on WWT trials beginning at
shared points in the alphabet ('a' compared to 'b' and 'm' compared to 'n').
However, trials initiating with letters from the beginning of the alphabet
compared to mid-alphabet showed significant differences (with higher number of
correct letters and fewer errors for 'a' and 'b' trials) but not for velocity.
Thus, starting WWT in mid-alphabet is different from starting at the beginning of
the alphabet. Alternate forms of the WWT with two separate initial letters from a
shared point of the alphabet (specifically 'a' and 'b' or 'm' and 'n') may be
used upon repeated administration to reduce practice effects.
CI - Copyright (c) 2011 Elsevier B.V. All rights reserved.

Langue : ANGLAIS