Does GPT-4 surpass human performance in linguistic pragmatics?
Paper · 2023 · Ljubisa Bojic, Predrag Kovacevic and Milan Cabarkapa
Summary
The paper tests whether large language models can recover implied meaning in conversation, a skill central to linguistic pragmatics. The authors wrote short invented dialogues around Grice's Cooperative Principle and its four maxims, where a speaker flouts a maxim and the listener must infer an implicature. GPT-2, GPT-3, GPT-3.5, GPT-4 and Bard answered the same open questions as 147 people, who formed two groups: 71 participants, most of them students in Serbia, and 76 people from the U.S. whose first language is English. Linguists graded all responses and combined the grading with triangulation. The authors expected humans to win, but the data contradicted this. GPT-4 achieved the best score, placing above the strongest human, and the LLMs as a group averaged higher than either human cohort. The older GPT-2 and GPT-3, which lack instruction tuning, did markedly worse. The authors note limits: non-random sampling, unequal testing conditions, English-only items and scripted rather than natural dialogue. The result matters because it shows pragmatic inference can emerge from general training without a task-specific objective.
Key points
- The test design is grounded in Grice's maxims (Quantity, Quality, Relation, Manner) and in Relevance Theory by Sperber and Wilson. It covers both conversational implicatures (for example, irony at a rainy bus stop) and conventional ones triggered by words like "but".
- The top scores were GPT-4 at 4.80 and the best human at 4.55, followed by GPT-3.5 at 4.10, Bard at 3.75, GPT-3 at 3.25 and GPT-2 at 1.05.
- Group averages were 3.39 for the LLMs, 2.80 for the Serbian students and 2.34 for the U.S. participants. In a joint ranking of 155 subjects, GPT-4 came first and the best human second.
- Hypothesis H1, that humans would beat LLMs, was not supported.
- The models had observed weaknesses:
- They tended to give overly long answers.
- They sometimes misjudged which speaker was responsible for the communicative problem.
- Non-instruction-tuned models struggled with the prompt format.
Interesting ideas
- I1. Build each test dialogue so that one named Gricean maxim is deliberately flouted, which gives every item a known "reason" for the implied meaning and makes the answer checkable.
- I2. Grade not only the recovered meaning but also which participant caused the conversational difficulty. Attribution errors turned out to be a distinct failure mode, separate from misreading the message.
- I3. Treat conventional implicature as lexically triggered and context-independent: "but" always signals contrast, unlike context-driven conversational implicature.
- I4. Place models and humans from different populations on a single ranked leaderboard instead of reporting only averages. This exposes overlap between groups and shows where the best individual sits.
- I5. Begin with controlled, invented dialogues to isolate variables, then plan validation on naturally occurring corpus discourse for ecological validity.
For Mova
How these ideas could serve Mova, our small open language model — its files, stages and tests:
- I1 (frames): crate prag could output the flouted maxim as an explicit, explainable label next to each inferred implicature, and these scripted dialogues could serve as unit tests for that label.
- I2 (frames): implicature frames could carry a "source speaker" slot linked through coreference, and attribution accuracy could be scored separately from meaning accuracy.
- I3 (frames): a small lexicon of trigger words could fire contrast or expectation frames directly from the UD tree before any contextual reasoning runs.
- I4 (learn): Mova's readers, LLM teachers and human baselines could be ranked together on pragmatics items, revealing which teacher tier is actually reliable.
- I5 (learn): synthetic maxim-flouting items could serve as clean regression and negative-control tests, while natural fable and dialogue text checks that gains transfer.
Institutions
Fields, topics and concepts
📚 Shelves 4The field of science this work belongs to (OpenAlex fields).Computer Science · 16,667 worksArtificial Intelligence · 16,194 worksArts and Humanities · 16,039 worksLanguage and Linguistics · 15,891 works
🧭 Topics 1Research subjects and languages the work is about.Language models & pretraining · 3,320 works
Cite
Cite as Ljubisa Bojic, Predrag Kovacevic and Milan Cabarkapa. 2023. Does GPT-4 surpass human performance in linguistic pragmatics?. arXiv:2312.09545.
@misc{bojic2023does,
title = {{Does GPT-4 surpass human performance in linguistic pragmatics?}},
author = {Ljubisa Bojic, Predrag Kovacevic and Milan Cabarkapa},
year = {2023},
doi = {10.48550/arxiv.2312.09545},
eprint = {2312.09545},
archivePrefix = {arXiv},
url = {https://doi.org/10.48550/arxiv.2312.09545}
}References
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