CL-ECPE: contrastive learning with adversarial samples for emotion-cause pair extraction

Abstract

The existing Emotion-Cause Pair Extraction (ECPE) has made some achievements, and it is applied in many tasks, such as criminal investigations. Previous approaches realised extraction by constructing different networks, but they did not fully exploit the original information of the data, which led to low extraction precision. Moreover, the extraction precision will also be decreased when the model is attacked by adversarial samples. To address the above problems, a new model CL-ECPE is proposed in this article to improve the extraction precision through contrastive learning. First, contrastive sets are constructed by adversarial samples. The contrastive sets are used as the raw data of adversarial training and the test data of the pilot experiment. Then, adversarial training is used to get contrastive features according to the training target. The acquisition of contrastive features can improve extraction precision. Experimental results on the benchmark emotion cause corpus show our method outperforms the state-of-the-art method by over 12.49%, as well as demonstrates the strong robustness of CL-ECPE.

KEYWORDS:

• Contrastive learning
• Emotion cause
• Adversarial samples
• ECPE

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by National Natural Science Foundation of China: [Grant Number 62076006]; 2019 Anhui Provincial Natural Science Foundation Project: [Grant Number 1908085MF189]; University Synergy Innovation Program of Anhui Province: [Grant Number GXXT-2021-008]; 2021 Anhui Province University Graduate Student Scientific Research Project: [Grant Number YJS20210402]; Anhui Provincial Key R&D Program: [Grant Number 202004b11020029].