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Differential Analysis of Age, Gender, Race, Sentiment, and Emotion in Substance Use Discourse on Twitter During the COVID-19 Pandemic: A Natural Language Processing Approach

Differential Analysis of Age, Gender, Race, Sentiment, and Emotion in Substance Use Discourse on Twitter During the COVID-19 Pandemic: A Natural Language Processing Approach

The model is based on bidirectional encoder representations from transformers, which takes the number of emotion classes (|C|=10) and a sequence “s” as inputs formatted with standard tokens (start_of_token [CLS] and separator_token [SEP]) as [CLS] + [C] + [SEP] + s. The encoding of emotion classed in the input makes the model learn the association between the emotion classes and the words in the input sentence, which is why it outperforms existing emotion classifiers.

Julina Maharjan, Ruoming Jin, Jennifer King, Jianfeng Zhu, Deric Kenne

JMIR Infodemiology 2025;5:e67333