Fig. 1: Schematic of study design.
From: Individual differences in frontoparietal plasticity in humans

The study protocol began with a five-minute introduction to the n-back working memory task. Participants completed two MRI sessions consisting of structural and functional scans before and after 50 minutes of n-back training. Prior to and following the 50-min training period, participants completed a 15-min assessment to measure performance on the n-back task.