*3.2. Task Performance*

Mean percentage of accuracy was computed for each condition (same colour trials, infrequent position or colour, frequent position or colour, right hemifield, left hemifield), for the three groups. The first 400 trials were included in the analysis in order to eliminate possible practice and fatigue effects. Mean percentage of accuracy in the visuospatial attention task for each condition and for all groups are presented in Table 2. Results show that control as well as mTBI participants showed valid and reproducible behavioural data on the task. Groups were equivalent on all the conditions of the task (*Fs* < 1).


**Table 2.** Accuracy (percent) for each task condition, for the three groups.

Mean reaction times for correct responses were computed for each condition (same colour trials, infrequent position or colour, frequent position or colour, right hemifield, left hemifield), for each group. Results are presented in Table 3. For all individual conditions tested, there was a significant between group difference on mean reaction times (*Fs*(2,55) ≥ 3.7, *ps* < 0.05), where subacute mTBI participants were slower than controls (*p* < 0.05).

**Table 3.** Reaction time (ms) for each task condition, for correct trials, for the three groups.

