Dual-Domain Attention Based Adaptive Graph Convolutional Network for EEG Emotion Recognition

The asymmetry of emotional responses is observed in electroencephalogram (EEG) of different frequency bands across various spatial brain regions in neuroscience research. Many prior works have primarily emphasized the dependencies among channels in the spatial domain, neglecting the dynamic interaction of EEG in both spatial and frequency domains, which may limit the performance of EEG emotion recognition. To address these issues, we propose the dual-domain attention based adaptive graph convolutional network (DDA-AGCN) for EEG emotion recognition. Specifically, we propose the lightweight dual-domain attention mechanism (DDA) based on random vector similarity measurement and the squeezeexcitation technique to capture important characteristics in the channel and frequency domain respectively. Furthermore, the adaptive graph convolutional network (AGCN) is utilized to adaptively filter and refine low signal-to-noise ratio EEG data, while also learning the dynamic connectivity patterns among important EEG channels and extracting higher-level abstract features for emotion recognition tasks. To validate the effectiveness of the proposed method, experimental comparisons were conducted on SEED, SEED-IV, and MPED. The experimental results show that our method achieves highly competitive classification performance compared to existing methods. Moreover, under fair comparison, the DDA demonstrates better performance and computational efficiency than self-attention.