An Improved Genetic Based Keyword Extraction Technique

Rose, J. Dafni; Dev, Divya D.; Robin, C. R. Rene

doi:10.1007/978-3-319-01692-4_12

Cited by 2 publications

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“…The purpose of this work is to automatically extract keywords from student comments to enhance teaching quality. In fact, topic keywords have been used for text summarization, terms index, classification, filtering, opinion mining, and topic detection [3][4][5][6][7][8]. Topic keywords are usually extracted by domain experts.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Keyword Extraction Methods and Visualization for Student Online Comments

Liu

Huang

et al. 2020

Symmetry

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Topic keyword extraction (as a typical task in information retrieval) refers to extracting the core keywords from document topics. In an online environment, students often post comments in subject forums. The automatic and accurate extraction of keywords from these comments are beneficial to lecturers (particular when it comes to repeatedly delivered subjects). In this paper, we compare the performance of traditional machine learning algorithms and two deep learning methods in extracting topic keywords from student comments posted in subject forums. For this purpose, we collected student comment data from a period of two years, manually tagging part of the raw data for our experiments. Based on this dataset, we comprehensively compared the five typical algorithms of naïve Bayes, logistic regression, support vector machine, convolutional neural networks, and Long Short-Term Memory with Attention (Att-LSTM). The performances were measured by the four evaluation metrics. We further examined the keywords by visualization. From the results of our experiment and visualization, we conclude that the Att-LSTM method is the best approach for topic keyword extraction from student comments. Further, the results from the algorithms and visualization are symmetry, to some degree. In particular, the extracted topics from the comments posted at the same stages of different teaching sessions are, almost, reflection symmetry.

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