Aspect-level sentiment classification based on attention-BiLSTM model and transfer learning

Aspect-level sentiment classification, a fine-grained sentiment analysis task which provides entire and intensive results, has been a research focus in recent years. However, the performance of neural network models is largely limited by the small scale of datasets for aspect-level sentiment classif...

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Bibliographic Details
Published in:Knowledge-based systems 2022-06, Vol.245, p.108586, Article 108586
Main Authors: Xu, Guixian, Zhang, Zixin, Zhang, Ting, Yu, Shaona, Meng, Yueting, Chen, Sijin
Format: Article
Language:English
Subjects:
Attention
BiLSTM
Classification
Data mining
Datasets
Knowledge management
Machine learning
Neural networks
Sentiment analysis
Sentiment classification
Training
Transfer learning
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Summary:Aspect-level sentiment classification, a fine-grained sentiment analysis task which provides entire and intensive results, has been a research focus in recent years. However, the performance of neural network models is largely limited by the small scale of datasets for aspect-level sentiment classification due to the challenges to label such data. In this paper, we propose an aspect-level sentiment classification model based on Attention-Bidirectional Long Short-Term Memory (Attention-BiLSTM) model and transfer learning. Based on Attention-BiLSTM model, three models including Pre-training (PRET), Multitask learning (MTL), and Pre-training & Multitask learning (PRET+MTL) are proposed to transfer the knowledge obtained from document-level training of sentiment classification to aspect-level sentiment classification. Finally, the performance of the four models is verified on four datasets. Experiments show that proposed methods make up for the shortcomings of poor training of neural network models due to the small dataset of the aspect-level sentiment classification.
ISSN:0950-7051
1872-7409
DOI:10.1016/j.knosys.2022.108586