Linear Classifier: An Often-Forgotten Baseline for Text Classification
Authors: Yu-Chen Lin, Si-An Chen, Jie-Jyun Liu, Chih-Jen Lin
AI-generated Key Points
- Authors emphasize the importance of using simple baselines like linear classifiers in conjunction with advanced methods like BERT for text classification
- Linear methods demonstrate competitive performance, high efficiency, and robustness for many text data sets
- Running linear classifiers alongside advanced models allows researchers to compare results and determine if the advanced model's performance is acceptable or if further improvements are needed
- Simple baselines act as a benchmark to confirm whether the outcomes of advanced models align with expectations
- Experimental results presented by the authors validate their argument and reinforce the significance of incorporating simple baselines into text classification workflows
- Using linear classifiers as a baseline enhances understanding of model performance and helps make more informed decisions regarding deployment strategies.
Abstract: Large-scale pre-trained language models such as BERT are popular solutions for text classification. Due to the superior performance of these advanced methods, nowadays, people often directly train them for a few epochs and deploy the obtained model. In this opinion paper, we point out that this way may only sometimes get satisfactory results. We argue the importance of running a simple baseline like linear classifiers on bag-of-words features along with advanced methods. First, for many text data, linear methods show competitive performance, high efficiency, and robustness. Second, advanced models such as BERT may only achieve the best results if properly applied. Simple baselines help to confirm whether the results of advanced models are acceptable. Our experimental results fully support these points.
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