Abstract：
:Classification of spoken word-evoked potentials is useful for both neuroscientific and clinical applications including brain-computer interfaces (BCIs). By evaluating whether adopting a biology-based structure improves a classifier's accuracy, we can investigate the importance of such structure in human brain circuitry, and advance BCI performance. In this study, we propose a semantic-hierarchical structure for classifying spoken word-evoked cortical responses. The proposed structure decodes the semantic grouping of the words first (e.g., a body part vs. a number) and then decodes which exact word was heard. The proposed classifier structure exhibited a consistent ∼10% improvement of classification accuracy when compared with a non-hierarchical structure. Our result provides a tool for investigating the neural representation of semantic hierarchy and the acoustic properties of spoken words in human brains. Our results suggest an improved algorithm for BCIs operated by decoding heard, and possibly imagined, words.
journal_name
J Neurosci Methodsjournal_title
Journal of neuroscience methodsauthors
Na Y,Choi I,Jang DP,Kang JK,Woo Jdoi
10.1016/j.jneumeth.2018.10.034subject
Has Abstractpub_date
2019-01-01 00:00:00pages
253-258eissn
0165-0270issn
1872-678Xpii
S0165-0270(18)30348-0journal_volume
311pub_type
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journal_title：Journal of neuroscience methods
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