A lexicon-based approach is a method used in sentiment analysis that relies on a predefined set of words or phrases, often called a lexicon, to determine the emotional tone of a piece of text. This approach assigns sentiment scores to words and aggregates them to evaluate the overall sentiment of the text. It is particularly useful for identifying the polarity of sentiments, whether they are positive, negative, or neutral, based on the presence and frequency of words from the lexicon.
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