---
title: "Aspect Level Sentiment Classification with Deep — Tang 2016"
description: "The paper addresses aspect level sentiment classification: given a sentence and one aspect term in it, the goal is to predict the polarity toward that…"
authors: ["Duyu Tang", "Bing Qin", "Ting Liu"]
year: 2016
venue: "Proceedings of the 2016 Conference on Empirical Methods in Natural Language Processing"
source: "https://aclanthology.org/D16-1021/"
doi: "10.18653/v1/d16-1021"
licence: "CC BY 4.0 (ACL Anthology)"
licence_url: "https://creativecommons.org/licenses/by/4.0/"
summary_licence: "Elamur Cosmic License"
canonical: "https://research.elamur.ai/free/en/papers/tang-2016-aspect-level-sentiment-classification-deep/"
---
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# Aspect Level Sentiment Classification with Deep Memory Network

**Authors:** [Duyu Tang](https://md.research.elamur.ai/free/en/authors/duyu-tang/), [Bing Qin](https://md.research.elamur.ai/free/en/authors/bing-qin/), [Ting Liu](https://md.research.elamur.ai/free/en/authors/ting-liu/) · **Year:** 2016 · **Venue:** Proceedings of the 2016 Conference on Empirical Methods in Natural Language Processing · **Licence:** [CC BY 4.0 (ACL Anthology)](https://creativecommons.org/licenses/by/4.0/)

**Links:** [Publisher's page](https://aclanthology.org/D16-1021/) · [PDF](https://aclanthology.org/D16-1021.pdf) · [DOI 10.18653/v1/d16-1021](https://doi.org/10.18653/v1/d16-1021) · [OpenAlex](https://openalex.org/W2963168371)

**Citations:** 1041 citations (openalex-snapshot · 2026-10-14) · [146](#cited-by) in our library, of the 140884 papers whose bibliographies we read

## Summary
The paper addresses aspect level sentiment classification: given a sentence and one aspect term in it, the goal is to predict the polarity toward that aspect (positive, negative, neutral). The authors argue that sequential models such as LSTM treat every context word with the same operation and do not show which words drive the decision. They propose a deep memory network inspired by Sukhbaatar et al. (2015). The context word embeddings form an external memory. The aspect vector repeatedly queries this memory through several stacked hops, and each hop combines content-based and location-based attention with a linear transform of the aspect. The final hop's output feeds a softmax classifier, and the whole model is trained end-to-end with cross-entropy. It needs no parser and no sentiment lexicon. On the SemEval 2014 laptop and restaurant datasets, the model roughly matches a strong feature-based SVM and clearly beats LSTM and attention-based LSTM. It is also much faster. This shows that lightweight, interpretable attention can compete with heavily engineered systems.

## Key points
- The experiments draw on two SemEval 2014 benchmarks, one covering laptops and one covering restaurants (Pontiki et al., 2014). Baselines are the feature-based SVM of Kiritchenko et al. (2014), LSTM, and attention-based LSTM (Tang et al., 2015a).
- Each hop scores every memory slot with a small feed-forward network over the slot and the aspect vector, using tanh followed by softmax. The weighted sum of the memory is then added to a linear transform of the aspect.
- Attention and linear layers share parameters across hops, so a 1-hop model and a 9-hop model have the same number of parameters. Adding hops improved accuracy on both datasets.
- Location is defined as a word's absolute distance from the aspect, and four strategies for encoding it were tested. Using content and location together gave better context weights than content alone.
- On CPU, the 9-hop memory network runs about 15 times faster than LSTM. In the error analysis, the main failure types were:
  - non-compositional idioms such as "to die for";
  - long multi-word aspects;
  - negation, comparison and conditional relations.

## Interesting ideas
- **Shared weights across hops.** Tying parameters over hops lets you deepen reasoning without growing the model. This could be a cheap way to add depth to small models for low-resource languages such as Ukrainian.
- **Target as a query, context as memory.** Treating the target term as a query and the remaining words as memory fits any target-dependent task, such as entity-level stance or opinions about a product or a country in trade news. The attention weights also show which words drove the decision.
- **Distance-aware attention.** Biasing attention toward words close to the target is a simple prior that needs no syntactic parser. It is useful where parsers or UD treebank-trained tools are weak.
- **Averaging multi-word aspects.** Representing a multi-word aspect by averaging its word vectors is a quick baseline. The paper's error analysis also flags it as a weak point, which makes it a useful thing to check when diagnosing errors.
- **Error categories as an evaluation checklist.** Grouping errors into idioms, complex aspects, and negation, comparison or condition gives a practical template for evaluating sentiment systems on new corpora.

*Our summary of the paper, in our own words — not its text. The work belongs to its authors; read it at the links above.*

Fields: [Natural language processing](https://md.research.elamur.ai/free/en/shelves/nlp/)

## Cited by

Cited by

146 papers of our library cite it (of the 140884 whose bibliographies we read); 14 of them have a page here, 132 not yet.

- [Aspect-Category-Opinion-Sentiment Quadruple Extraction with Implicit Aspects and Opinions](https://md.research.elamur.ai/free/en/papers/cai-2021-aspect-category-opinion-sentiment-quadruple/)
- [Recurrent Attention Network on Memory for Aspect Sentiment Analysis](https://md.research.elamur.ai/free/en/papers/chen-2017-recurrent-attention-network-memory-aspect/)
- [A Challenge Dataset and Effective Models for Aspect-Based Sentiment Analysis](https://md.research.elamur.ai/free/en/papers/jiang-2019-challenge-dataset-effective-models-aspect/)
- [Transformation Networks for Target-Oriented Sentiment Classification](https://md.research.elamur.ai/free/en/papers/li-2018-transformation-networks-target-oriented-sentiment/)
- [Arabic aspect based sentiment analysis using bidirectional GRU based models](https://md.research.elamur.ai/free/en/papers/m-2021-abdelgwad-arabic-aspect-based-sentiment-analysis/)
- [Arabic aspect sentiment polarity classification using BERT](https://md.research.elamur.ai/free/en/papers/m-2021-abdelgwad-arabic-aspect-sentiment-polarity-classification/)
- [Utilizing BERT for Aspect-Based Sentiment Analysis via Constructing Auxiliary Sentence](https://md.research.elamur.ai/free/en/papers/sun-2019-utilizing-bert-aspect-based-sentiment/)
- [Relational Graph Attention Network for Aspect-based Sentiment Analysis](https://md.research.elamur.ai/free/en/papers/wang-2020-relational-graph-attention-network-aspect/)
- [BERT Post-Training for Review Reading Comprehension and Aspect-based Sentiment Analysis](https://md.research.elamur.ai/free/en/papers/xu-2019-bert-post-training-review-reading/)
- [Position-Aware Tagging for Aspect Sentiment Triplet Extraction](https://md.research.elamur.ai/free/en/papers/xu-2020-position-aware-tagging-aspect-sentiment/)
- [A Unified Generative Framework for Aspect-based Sentiment Analysis](https://md.research.elamur.ai/free/en/papers/yan-2021-unified-generative-framework-aspect-based/)
- [Chinese Zero Pronoun Resolution with Deep Memory Network](https://md.research.elamur.ai/free/en/papers/yin-2017-chinese-zero-pronoun-resolution-deep/)
- [Zero Pronoun Resolution with Attention-based Neural Network](https://md.research.elamur.ai/free/en/papers/yin-2018-zero-pronoun-resolution-attention-based/)
- [Aspect-based Sentiment Classification with Aspect-specific Graph Convolutional Networks](https://md.research.elamur.ai/free/en/papers/zhang-2019-aspect-based-sentiment-classification-aspect/)

## Cite

The paper itself, not this page. BibTeX from the library's record of the work.

```bibtex
@inproceedings{tang2016aspect,
  title = {{Aspect Level Sentiment Classification with Deep Memory Network}},
  author = {Tang, Duyu and Qin, Bing and Liu, Ting},
  booktitle = {Proceedings of the 2016 Conference on Empirical Methods in Natural Language Processing},
  year = {2016},
  doi = {10.18653/v1/d16-1021},
  url = {https://doi.org/10.18653/v1/d16-1021}
}
```

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