Fig. 2.

Cognitive Task Design. Illustration of the n-back and recognition memory paradigms. The n-back task included two memory load conditions: the 0-back (left panel) and the 2-back (middle panel). The 0-back condition required sustained attention in order to detect a rare target. The 2-back condition required maintenance and updating of any stimulus that repeated itself 2 trials later (working memory). The recognition memory task (right panel) tested for memory of items from the n-back task. Words in red represent correct responses.