title: Discriminating Multiple Emotional States from EEG Using a Data-Adaptive, Multiscale Information-Theoretic Approach.
abstract: A multivariate sample entropy metric of signal complexity is applied to EEG data recorded when subjects were viewing four prior-labeled emotion-inducing video clips from a publically available, validated database. Besides emotion category labels, the video clips also came with arousal scores. Our subjects were also asked to provide their own emotion labels. In total 30 subjects with age range 19-70 years participated in our study. Rather than relying on predefined frequency bands, we estimate multivariate sample entropy over multiple data-driven scales using the multivariate empirical mode decomposition (MEMD) technique and show that in this way we can discriminate between five self-reported emotions (p < 0.05). These results could not be obtained by analyzing the relation between arousal scores and video clips, signal complexity and arousal scores, and self-reported emotions and traditional power spectral densities and their hemispheric asymmetries in the theta, alpha, beta, and gamma frequency bands. This shows that multivariate, multiscale sample entropy is a promising technique to discriminate multiple emotional states from EEG recordings.
authors.affiliation: 1 Research Group Neurophysiology, Laboratory for Neuro- and Psychophysiology, O&N II Herestraat 49 - Box 1021, 3000 Leuven, Belgium.
authors.forename: Yelena
authors.initials: Y
authors.lastname: Tonoyan
authors.affiliation: 2 Communication and Signal Processing Research Group, Department of Electrical and Electronic Engineering, Imperial College, Room 813, Level 8, Exhibition Road, London, SW7 2BT, United Kingdom.
authors.forename: David
authors.initials: D
authors.lastname: Looney
authors.affiliation: 2 Communication and Signal Processing Research Group, Department of Electrical and Electronic Engineering, Imperial College, Room 813, Level 8, Exhibition Road, London, SW7 2BT, United Kingdom.
authors.forename: Danilo P
authors.initials: DP
authors.lastname: Mandic
authors.affiliation: 1 Research Group Neurophysiology, Laboratory for Neuro- and Psychophysiology, O&N II Herestraat 49 - Box 1021, 3000 Leuven, Belgium.
authors.forename: Marc M
authors.initials: MM
authors.lastname: Van Hulle
mesh_terms: D000328:Adult; D000368:Aged; D004569:Electroencephalography / Q000379:methods*; D004644:Emotions / Q000502:physiology*; D019277:Entropy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D010775:Photic Stimulation / Q000379:methods
keywords: EMD; Emotion; complexity; multiscale sample entropy