In order to evaluate intellectual productivity caused by the work environmental change, subject experiments have been conducted in the conventional studies where specially designed tasks were given and the task performance were measured.
In one of these studies, the tasks for evaluation of intellectual productivity have been developed.
It is expected that intellectual productivity such as concentration on mental works can be measured quantitatively by the developed tasks.
However, the brain areas activated by these tasks have not been yet confirmed.
Therefore, in this study, the authors aimed at evaluating human brain activity by Near-infrared-spectroscopy when performing the developed tasks.
As the result of the experiment, it was found that the brain areas corresponding to working memory and visual sensation were activated in 2-digit addition and word classi cation task respectively.