relation: https://khub.utp.edu.my/scholars/6796/ title: Mental stress assessment using simultaneous measurement of EEG and fNIRS creator: Al-Shargie, F. creator: Kiguchi, M. creator: Badruddin, N. creator: Dass, S.C. creator: Hani, A.F.M. creator: Tang, T.B. description: Previous studies reported mental stress as one of the major contributing factors leading to various diseases such as heart attack, depression and stroke. An accurate stress assessment method may thus be of importance to clinical intervention and disease prevention. We propose a joint independent component analysis (jICA) based approach to fuse simultaneous measurement of electroencephalography (EEG) and functional near-infrared spectroscopy (fNIRS) on the prefrontal cortex (PFC) as a means of stress assessment. For the purpose of this study, stress was induced by using an established mental arithmetic task under time pressure with negative feedback. The induction of mental stress was confirmed by salivary alpha amylase test. Experiment results showed that the proposed fusion of EEG and fNIRS measurements improves the classification accuracy of mental stress by +3.4 compared to EEG alone and +11 compared to fNIRS alone. Similar improvements were also observed in sensitivity and specificity of proposed approach over unimodal EEG/fNIRS. Our study suggests that combination of EEG (frontal alpha rhythm) and fNIRS (concentration change of oxygenated hemoglobin) could be a potential means to assess mental stress objectively. © 2016 Optical Society of America. publisher: OSA - The Optical Society date: 2016 type: Article type: PeerReviewed identifier: Al-Shargie, F. and Kiguchi, M. and Badruddin, N. and Dass, S.C. and Hani, A.F.M. and Tang, T.B. (2016) Mental stress assessment using simultaneous measurement of EEG and fNIRS. Biomedical Optics Express, 7 (10). pp. 3882-3898. ISSN 21567085 relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85011990036&doi=10.1364%2fBOE.7.003882&partnerID=40&md5=6f253771fb75e81ef4753cff6e893786 relation: 10.1364/BOE.7.003882 identifier: 10.1364/BOE.7.003882