Human brain activity for machine attention

• URL: http://arxiv.org/abs/2006.05113v2
• Date: Fri, 2 Oct 2020 22:06:31 GMT
• Title: Human brain activity for machine attention
• Authors: Lukas Muttenthaler, Nora Hollenstein, Maria Barrett
• Abstract summary: We are the first to exploit neuroscientific data, namely electroencephalography (EEG), to inform a neural attention model about language processing of the human brain. We devise a method for finding such EEG features to supervise machine attention through combining theoretically motivated cropping with random forest tree splits. We apply these features to regularise attention on relation classification and show that EEG is more informative than strong baselines.
• Score: 8.673635963837532
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Cognitively inspired NLP leverages human-derived data to teach machines about language processing mechanisms. Recently, neural networks have been augmented with behavioral data to solve a range of NLP tasks spanning syntax and semantics. We are the first to exploit neuroscientific data, namely electroencephalography (EEG), to inform a neural attention model about language processing of the human brain. The challenge in working with EEG data is that features are exceptionally rich and need extensive pre-processing to isolate signals specific to text processing. We devise a method for finding such EEG features to supervise machine attention through combining theoretically motivated cropping with random forest tree splits. After this dimensionality reduction, the pre-processed EEG features are capable of distinguishing two reading tasks retrieved from a publicly available EEG corpus. We apply these features to regularise attention on relation classification and show that EEG is more informative than strong baselines. This improvement depends on both the cognitive load of the task and the EEG frequency domain. Hence, informing neural attention models with EEG signals is beneficial but requires further investigation to understand which dimensions are the most useful across NLP tasks.

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