There seems to be 5 - 10 % of children are affected by Attention-deficit hyperactivity disorder (ADHD). The symptoms such as inattention, hyperactivity, and impulsivity affect their learning and school activity. The treatment with medicine has some severe side effects in some ADHD patients. There are several methods to reduce the symptom of inattention without some medicine. In this study, we investigated two methods to improve inattention for ADHD. One method was working memory training. Another one was a multi-task video game. We evaluated the effect of these two methods on the improvement of learning performance or inhibitory control. 

High school students were given 10 minutes of training per day for ten days as the working memory training experiment. Before and after the training, basic learning skills were assessed, i.e., mental arithmetic, English listening comprehension, and working memory capacity. Across subjects, there were no significant differences in training effects between the training and control groups. However, analysis of the results of the two groups, one with high and the other with low working memory performance, showed that the low performing group did benefit from the training.

We developed a game consisting of a Go/No go task and a sensory-motor navigation task. We compared the difference between multitasking and single task in training from the results of 3 test tasks, which differ from training tasks. Our results show that changing the training content to multitasking may increase the performance of inhibitory control improvement.