Utilizing NLP Sentiment Analysis Approach to Categorize Amazon Reviews against an Extended Testing Set
Keywords:
Machine Learning, NLP, Sentiment AnalysisAbstract
Sentiment analysis, also known as opinion mining, is a pivotal aspect of natural language processing (NLP). This method entails discerning the polarity of textual information and determining whether it conveys positive or negative sentiments. In one of the domains, e-commerce, sentiment analysis assumes paramount significance. It offers businesses a nuanced understanding of their brand and product sentiment as reflected in customer reviews, facilitating market comprehension and strategic decision-making. This study primarily focused on analyzing the Amazon food reviews dataset, augmenting the original dataset with newly generated data, and subsequently conducting data preprocessing tasks, encompassing text cleansing, removing stop words, lemmatization, and stemming. Subsequently, machine learning models were constructed, trained, and evaluated using NLP feature extraction techniques to address the sentiment analysis challenge and investigate the impact of increased data volume on model performance. Among the diverse methodologies employed for extracting features from textual data samples, this research integrated term frequency-inverse document frequency (TF-IDF), Word to Vector (W2V), and Bag of Words (BoW) techniques in the feature extraction phase. Furthermore, three distinct machine learning models, namely Logistic Regression, Decision Tree, and Random Forest, were designed, implemented, and assessed. The models' performance was scrutinized following hyperparameter optimization to determine the most effective approach. The outcomes revealed that the performance of the models was consistent, yielding accuracy rates ranging from 85% to 89% on the testing dataset. Nevertheless, the Logistic Regression model, employing BoW features, demonstrated superior performance compared to the other models. Following optimization of the logistic regression model, a remarkable accuracy of 89% was attained on the testing dataset by operating the BoW extracted features.
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