This paper discusses hemodynamics when subject repeats the attentional control task. Generally, repetition is related to learning effects and leads to his or her habituation. In that case, brain activity in prefrontal area decays, in comparison with the single task. However, if the task itself gives large load to working memory, reaction in brain may not change. Our team notes this point and evaluates the hemodynamics of the subject using near-infrared spectroscopy. We apply multivariable estimated models which show properties of each stage, given by hierarchical decomposition method.
This paper discusses "attention" in cognitive function by analyzing hemodynamics and potentials while performing modified paced visually serial addition test (mPVSAT). The test needs higher-order attention i.e. selective attention, which is evaluated by event related hemodynamics and event related potentials in our study.
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