---
title: "ValenTO at SemEval-2018 Task 3 — paper by Farías et al. (2018)"
description: "The paper describes the ValenTO entry to SemEval-2018 Task 3, which asked systems to… 0.1 F1. 37 references, cited by 1 paper here."
authors: ["Delia Irazú Hernández Farías", "Viviana Patti", "Paolo Rosso"]
year: 2018
venue: "Proceedings of the 12th International Workshop on Semantic Evaluation"
source: "https://aclanthology.org/S18-1105/"
doi: "10.18653/v1/s18-1105"
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/farias-2018-valento-semeval-2018-task-3/"
---
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# ValenTO at SemEval-2018 Task 3: Exploring the Role of Affective Content for Detecting Irony in English Tweets

**Authors:** [Delia Irazú Hernández Farías](https://md.research.elamur.ai/free/en/authors/delia-irazu-hernandez-farias/), [Viviana Patti](https://md.research.elamur.ai/free/en/authors/viviana-patti/) and [Paolo Rosso](https://md.research.elamur.ai/free/en/authors/paolo-rosso/) · **Year:** 2018 · **Venue:** [Proceedings of the 12th International Workshop on Semantic Evaluation](https://md.research.elamur.ai/free/en/venues/semeval/) ([SemEval 2018](https://md.research.elamur.ai/free/en/venues/semeval/2018/)) · **Publisher:** [Association for Computational Linguistics](https://md.research.elamur.ai/free/en/publishers/association-for-computational-linguistics/) · **Licence:** [CC BY 4.0 (ACL Anthology)](https://creativecommons.org/licenses/by/4.0/)

**Links:** [Publisher's page](https://aclanthology.org/S18-1105/) · [PDF](https://aclanthology.org/S18-1105.pdf) · [DOI 10.18653/v1/s18-1105](https://doi.org/10.18653/v1/s18-1105) · [OpenAlex](https://openalex.org/W2807380311)

**Citations:** 12 citations (OpenAlex, 2026-10-14) · 1 in our library, of the 141,840 papers whose bibliographies we read

## Summary
The paper describes the ValenTO entry to SemEval-2018 Task 3, which asked systems to detect irony in English tweets (Task A, binary) and to separate types of irony (Task B, four classes). The team reused emotIDM, an earlier irony model built mostly on affect. It draws on many English lexicons that cover sentiment polarity, discrete emotion categories and dimensional emotion scores, plus a small set of structural cues. The authors noticed that links were unevenly spread across the two classes in the training tweets, so they added a binary URL feature. They compared Decision Tree, Random Forest and SVM in constrained and unconstrained settings. The unconstrained runs added many earlier irony and sarcasm corpora. SVM with emotIDM+URL performed best. Officially the system placed 16th in Task A, about 0.1 F1 behind the winner, and 4th among unconstrained runs. For Task B, combining two classifiers gave a modest gain. The authors read the results as evidence that affective information alone carries much of the irony signal.

## Key points
- Task A training data had 1,911 ironic and 1,923 non-ironic tweets. Task B used four labels: non-irony (1923), verbal irony by polarity contrast (1393), other verbal irony (213) and situational irony (328).
- Affect resources fall into three groups:
  - Sentiment lexicons: Hu&Liu, General Inquirer, EffectWordNet, Subjectivity lexicon, EmoLex, AFINN, SWN, Semantic Orientation lexicon, SenticNet.
  - Emotion categories: EmoLex, EmoSenticNet, SentiSense, LIWC.
  - Dimensional models: ANEW, DAL, SenticNet.
- 857 of 3,834 training tweets contained a URL, and 592 of those were non-ironic. In 5-fold cross-validation, SVM with emotIDM+URL reached 0.64 (constrained) and 0.81 (unconstrained). Using affect features alone still gave 0.57 and 0.70.
- Official Task A F1 was 0.6079 (constrained) and 0.6067 (unconstrained), against a top score of 0.7054. In Task B, F1 was 0.3520, ranking 17th of 31.
- Per-class accuracy in Task B was 79% for non-irony, 45% for polarity-contrast irony, 40% for situational irony and 9.2% for other irony. Typical errors were tweets with no subjective wording, or tweets whose irony depends on outside context or only on the hashtag.

## Interesting ideas
- Affect is modelled as three separate views of the same words: polarity, discrete emotions, and continuous scores such as valence and arousal. Each view catches a different kind of evaluative clash.
- Before adding a feature, the authors checked how a cheap surface cue (URLs) was distributed over the classes, and found a strong skew worth encoding.
- Each class was routed to whichever classifier handled it best: the Decision Tree for the rare irony types, SVM for the rest.
- Results were broken down by collection hashtag (#irony, #sarcasm, #not) to confirm that the model was not leaning on one source. #not was handled both as an irony marker and as an ordinary negation.

## For Mova

How these ideas could serve Mova, our small open language model — its files, stages and tests:

- **I1** (frames): The irony module in prag could attach polarity, emotion and valence/arousal values to the predicate and to the described situation, then flag explicit mismatches between them as an explainable irony cue.
- **I2** (learn): Silver-data evaluation could routinely compare cue-by-class distributions to find shortcut signals, and then decide whether to exploit them or to control for them with negative controls.
- **I3** (learn): When several witness models disagree, trust could be assigned per label instead of globally, so rare categories follow the witness that is reliable for them.
- **I4** (tokens): The tokenizer could keep hashtag words available as ordinary lexical tokens, so that #not inside a sentence still parses as negation while a trailing #not is passed on to the pragmatics layer as a marker.

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

## Institutions

- [University of Turin](https://md.research.elamur.ai/free/en/universities/university-of-turin/) — University, Turin, Italy · 27 works · 6,505 citations
- [Universitat Politècnica de València](https://md.research.elamur.ai/free/en/universities/universitat-politecnica-de-valencia/) — University, Valencia, Spain · 21 works · 3,275 citations
- [National Institute of Astrophysics, Optics and Electronics](https://md.research.elamur.ai/free/en/labs/national-institute-of-astrophysics-optics-and-electronics/) — Research institute, Puebla City, Mexico · 2 works · 16 citations

Also on the byline: [National Institute for Astrophysics](https://ror.org/02gh4kt33).

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🧭 Topics (2): [English](https://md.research.elamur.ai/free/en/topics/english/) · 1,373 works · [😊 Sentiment & emotion](https://md.research.elamur.ai/free/en/topics/sentiment-emotion/) · 608 works

## Cite

Cite as: Delia Irazú Hernández Farías, Viviana Patti and Paolo Rosso. 2018. ValenTO at SemEval-2018 Task 3: Exploring the Role of Affective Content for Detecting Irony in English Tweets. Proceedings of the 12th International Workshop on Semantic Evaluation.

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

```bibtex
@inproceedings{farias2018valento,
  title = {{ValenTO at SemEval-2018 Task 3: Exploring the Role of Affective Content for Detecting Irony in English Tweets}},
  author = {Delia Irazú Hernández Farías, Viviana Patti and Paolo Rosso},
  booktitle = {Proceedings of the 12th International Workshop on Semantic Evaluation},
  year = {2018},
  doi = {10.18653/v1/s18-1105},
  url = {https://doi.org/10.18653/v1/s18-1105}
}
```

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## References

37 references, 11 of them with a card of ours. ↗ leads to the work, «find» searches for one we have no id for yet.

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*Updated 24 October 2026*