Challenge: Using coherence scores to choose topics, we test whether the results help us to understand user interests and concerns.
Approach: They analyze user reviews from Best Buy US website for smart speakers to determine whether they provide useful information for product analysis.
Outcome: The proposed models capture brand performance and differences and differentiate the market into two distinct groups with different properties.

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Improving the TENOR of Labeling: Re-evaluating Topic Models for Content Analysis (2024.eacl-long)

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Challenge: Existing evaluation metrics such as coherence and coherency are inadequate for neural topic models.
Approach: They conduct the first evaluation of neural, supervised and classical topic models in an interactive task-based setting.
Outcome: The proposed model performs better on cluster evaluation metrics and human evaluations than classical models on real-world tasks.
Contextualized Topic Coherence Metrics (2024.findings-eacl)

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Challenge: Existing topic models that estimate the interpretability of topics are difficult to compare due to their nature as unsupervised models.
Approach: They propose to use contextualized topic coherence metrics to simulate human-centered coherency evaluation while maintaining the efficiency of other automated methods.
Outcome: The proposed metrics better reflect human judgment on topics extracted from short text collections by avoiding highly scored topics that are meaningless to humans.
Why Didn’t You Listen to Me? Comparing User Control of Human-in-the-Loop Topic Models (P19-1)

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Challenge: Informed prior-based methods provide better control than constraints, but constraints yield higher quality topics, but with less control.
Approach: They propose to use constraints and informed prior-based methods to improve user control and topic coherence.
Outcome: The proposed methods improve user control and topic coherence, while constraints yield higher quality topics, but with less control.
Large Language Models Struggle to Describe the Haystack without Human Help: A Social Science-Inspired Evaluation of Topic Models (2025.acl-long)

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Challenge: a common use of NLP is to facilitate the understanding of large document collections.
Approach: They propose to use large language models to replace probabilistic topic models in real-world applications.
Outcome: The proposed model generates more human-readable topics and shows higher average win probabilities than traditional models for data exploration.
Are Neural Topic Models Broken? (2022.findings-emnlp)

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Challenge: Existing evaluation paradigms are often divorced from real-world use . recent results have challenged the validity of the prevailing model evaluation paradigm .
Approach: They show that neural topic models fare worse in both respects compared to an established classical method.
Outcome: The proposed method outperforms the members of the ensemble in both respects.
Combining Deep Learning and Topic Modeling for Review Understanding in Context-Aware Recommendation (N18-1)

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Challenge: Existing models for user reviews are limited by data sparsity and lack of data.
Approach: They propose to integrate LSTM and Topic Modeling to extract review information for recommender systems by utilizing user reviews.
Outcome: The proposed model outperforms existing models on Amazon review dataset and shows better ability on making topic clustering than traditional topic model based method.
Revisiting Automated Topic Model Evaluation with Large Language Models (2023.emnlp-main)

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Challenge: Topic models are an unsupervised dimensionality reduction technique that help organize large text collections.
Approach: They propose to use large language models to evaluate document output and determine optimal number of topics.
Outcome: The proposed model performs better on coherence ratings of word sets than on intrustion detection.
Is It Dish Washer Safe? Automatically Answering “Yes/No” Questions Using Customer Reviews (N19-3)

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Challenge: Using Amazon reviews, we find that the answer to a question is only in 45% of cases.
Approach: They combine Amazon reviews with consumer reviews and manually analyse 400 questions from four domains to find that reviews directly contain the answer to the question . they then compare QA systems that use reviews in addition to the questions to see if they can be useful for other question types.
Outcome: The proposed system outperforms the chance baseline but not by a large margin.
Adversarial Learning of Poisson Factorisation Model for Gauging Brand Sentiment in User Reviews (2021.eacl-main)

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Challenge: Existing models for sentiment-topic extraction assume topics are grouped under discrete sentiment categories such as ‘positive’, ‘negative’ and ‘neural’.
Approach: They propose a Brand-Topic Model which aims to detect brand-associated polarity-bearing topics from product reviews.
Outcome: The proposed model outperforms existing models on Amazon reviews and shows that it is more coherent and unique than existing models.
Is Neural Topic Modelling Better than Clustering? An Empirical Study on Clustering with Contextual Embeddings for Topics (2022.naacl-main)

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Challenge: Recent work incorporates pre-trained word embeddings into Neural Topic Models (NTMs), generating highly coherent topics.
Approach: They conduct thorough experiments to investigate whether embeddings directly with an appropriate word selection method can generate more coherent and diverse topics than NTMs.
Outcome: The proposed model generates more coherent and diverse topics than traditional NTMs, achieving higher efficiency and simplicity.

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