Takashi Abe

Our laboratory conducts research on human sleep and sleepiness in the fields of behavioral science, psychophysiology, and neuroscience. Currently, our main research topics are: (1) a method for the continuous estimation of response speed through non-contact measurement of eyelid indicators, and (2) the estimation of dream emotions during REM sleep using electroencephalography (EEG).

(1) A Method for the Continuous Estimation of Response Speed Through Non-contact Measurement of Eyelid Indices
The Psychomotor Vigilance Test (PVT) is highly sensitive to sleep manipulations (e.g., sleep deprivation, sleep restriction) and has been used as the gold standard for assessing performance deficits associated with drowsiness. However, one limitation of the PVT is that it cannot be performed simultaneously with other tasks. To address this, we have successfully developed a technique that enables high-accuracy, continuous estimation of response speed—the key PVT performance metric—for unknown populations using only eyelid-based indices measured by non-contact eye trackers or webcams. This technology is expected to be effective even in situations and for populations where drowsiness detection has been difficult with conventional methods. By applying this technology, we aim to establish a technique for detecting driver drowsiness, thereby preventing accidents. Furthermore, we aim to establish a simple method for assessing vigilance for various groups, including students, e-sports players, and office workers. Through this technology, we will advance research toward understanding and preventing drowsiness, with the goal of realizing a safe and productive society.

(2) Estimation of Dream Emotions During REM Sleep Using Electroencephalography (EEG)
We are developing a technology to accurately estimate dream emotions during REM sleep using EEG, aiming to establish a "No-report paradigm for dream emotion" that allows for the objective evaluation of dream emotions without relying on subjective reports. By establishing this technology, we aim to elucidate the function of dream emotions. Additionally, we are working on the development of techniques to reduce unpleasant dream emotions. By integrating these techniques, we aim to develop a closed-loop nightmare reduction technology.