Sessions 2 and 3 were devoted to computer-assisted attentional
training. Divided attention was trained using a simplified adaptation
of the program developed by Kramer et al. [26] . Participants
were trained in a dual-task condition to allocate their attention
according to different strategies. They were asked to combine
a visual detection task and an arithmetic task. Participants were
required to vary the attentional resources allocated to each task
in the dual task condition to emphasize either the visual or arithmetic
task.