FIGURE 5.

Individual performance enhancement in working memory training is not associated with level of impulsivity reduction (experiment 2). (A) The participants showed a significant performance improvement in the working memory task over time (Pearson’s correlation r = 0.50, P = 0.0017). Each dot represents mean accuracy within each window across participants, and error bars indicate s.e.m. (B) Individuals’ overall working memory performance was not associated with changes in their delay discounting rates (r = –0.18, P = 0.38, bootstrapping P = 0.36). (C) Individuals’ speed of working memory performance enhancement (performance slope) was not correlated with level of impulsivity reduction (r = –0.19, P = 0.35, bootstrapping P = 0.35). Each dot represents an individual, and solid red lines are robust regression lines. (D) Over the course of the working memory task, no significant association was observed between individuals’ working memory task accuracy and their impulsivity reduction level; if any, there were negative trends that showed that the individuals tended to show more impulsive choices in the post-intervention ITC task. ^†< 0.1.