Graph Adaptive Semantic Transfer for Cross-domain Sentiment Classification

TL;DR

This paper introduces GAST, a novel model that leverages adaptive graph and sequence representations to improve cross-domain sentiment classification by capturing domain-invariant semantics.

Contribution

The paper proposes GAST, a new method combining syntactic graph embeddings and sequence features with adaptive strategies for better domain transfer in sentiment analysis.

Findings

GAST achieves comparable performance to state-of-the-art models.

The hybrid approach effectively captures domain-invariant semantics.

Extensive experiments validate the model's robustness across datasets.

Abstract

Cross-domain sentiment classification (CDSC) aims to use the transferable semantics learned from the source domain to predict the sentiment of reviews in the unlabeled target domain. Existing studies in this task attach more attention to the sequence modeling of sentences while largely ignoring the rich domain-invariant semantics embedded in graph structures (i.e., the part-of-speech tags and dependency relations). As an important aspect of exploring characteristics of language comprehension, adaptive graph representations have played an essential role in recent years. To this end, in the paper, we aim to explore the possibility of learning invariant semantic features from graph-like structures in CDSC. Specifically, we present Graph Adaptive Semantic Transfer (GAST) model, an adaptive syntactic graph embedding method that is able to learn domain-invariant semantics from both word sequences and syntactic graphs. More specifically, we first raise a POS-Transformer module to extract sequential semantic features from the word sequences as well as the part-of-speech tags. Then, we design a Hybrid Graph Attention (HGAT) module to generate syntax-based semantic features by considering the transferable dependency relations. Finally, we devise an Integrated aDaptive Strategy (IDS) to guide the joint learning process of both modules. Extensive experiments on four public datasets indicate that GAST achieves comparable effectiveness to a range of state-of-the-art models.