Fig. 3

Change in motor task performance (TUG performance) from single to dual in the water-carry TUG assessment. (A) represents the mean TUG duration during the water-carry single-task TUG and the dual-task water-carry TUG in each group. (B) depicts individual data points. (C) depicts the motor dual-task effect during the water-carry TUG for each group. Blue bars represent the Non-Essential Tremor group, while orange bars represent the Essential Tremor group. Individual data points in each group are indicated by open-filled circles. DTE % = Dual Task Effect and was calculated as follows: ((Dual Task Performance – Single Task Performance) / Single Task Performance) *100. Therefore, positive values indicate facilitation that is improved performance (shorter TUG duration) in the dual-task condition compared to the single-task condition. Negative values indicate interference, that is, reduced performance (longer TUG duration) in the dual-task condition compared to the single-task condition.