Elderly subjects had larger DTC than younger ones, particularly in walk o + check gw , but the difference between age groups failed to reach statistical significance in t-tests (last column of Tab. 1 ).
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Dual-task costs while walking increase in old age for some, but not for other tasks: an experimental study of healthy young and elderly persons.
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Results An analysis of covariance yielded no significant effects of obstacle presence and overall task difficulty on ARD, but a highly significant effect of visual demand: non-walking tasks which required ongoing visual observation led to ARD of more than 8%, while those without such requirements led to near-zero ARD.