Emotional state classification from EEG data using machine learning approach

Recently, emotion classification from EEG data has attracted much attention with the rapid development of dry electrode techniques, machine learning algorithms, and various real-world applications of brain–computer interface for normal people. Until now, however, researchers had little understanding...

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Vydáno v:	Neurocomputing (Amsterdam) Ročník 129; s. 94 - 106
Hlavní autoři:	Wang, Xiao-Wei, Nie, Dan, Lu, Bao-Liang
Médium:	Journal Article Konferenční příspěvek
Jazyk:	angličtina
Vydáno:	Amsterdam Elsevier B.V 10.04.2014 Elsevier
Témata:	Applied sciences Artificial intelligence Biological and medical sciences Brain–computer interface Computer science; control theory; systems Computer systems and distributed systems. User interface Data processing. List processing. Character string processing Electrodiagnosis. Electric activity recording Electroencephalograph Emotion classification Exact sciences and technology Feature reduction Investigative techniques, diagnostic techniques (general aspects) Manifold learning Medical sciences Memory organisation. Data processing Nervous system Software Support vector machine Electroencephalograph Support vector machine Manifold learning Emotion classification Feature reduction Brain–computer interface Brain Smoothing methods Electroencephalography Emotion emotionality Dynamical system Dynamic method Data reduction Electrodes Brain-computer interface Dimension reduction Experimental result Multidimensional analysis User interface Vector support machine Selection criterion Reduced order model Artificial intelligence Power spectrum
ISSN:	0925-2312, 1872-8286
On-line přístup:	Získat plný text
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Popis
Shrnutí:	Recently, emotion classification from EEG data has attracted much attention with the rapid development of dry electrode techniques, machine learning algorithms, and various real-world applications of brain–computer interface for normal people. Until now, however, researchers had little understanding of the details of relationship between different emotional states and various EEG features. To improve the accuracy of EEG-based emotion classification and visualize the changes of emotional states with time, this paper systematically compares three kinds of existing EEG features for emotion classification, introduces an efficient feature smoothing method for removing the noise unrelated to emotion task, and proposes a simple approach to tracking the trajectory of emotion changes with manifold learning. To examine the effectiveness of these methods introduced in this paper, we design a movie induction experiment that spontaneously leads subjects to real emotional states and collect an EEG data set of six subjects. From experimental results on our EEG data set, we found that (a) power spectrum feature is superior to other two kinds of features; (b) a linear dynamic system based feature smoothing method can significantly improve emotion classification accuracy; and (c) the trajectory of emotion changes can be visualized by reducing subject-independent features with manifold learning.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0925-2312 1872-8286
DOI:	10.1016/j.neucom.2013.06.046