“…Our results are consistent with other studies which found that an increase in the difficulty of the stability task entails an increase of the postural sway amplitude (Lamoth, van Lummel, & Beek, 2009;Negahban et al, 2010;Stins, Ledebt, Emck, van Dokkum, & Beek, 2009;Stins, Michielsen, Roerdink, & Beek, 2009).…”