Published on in Vol 4, No 2 (2021): Apr-Jun
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/26475, first published
.
![Trends in Positive, Negative, and Neutral Themes of Popular Music From 1998 to 2018: Observational Study Trends in Positive, Negative, and Neutral Themes of Popular Music From 1998 to 2018: Observational Study](https://asset.jmir.pub/assets/43240216b0bf198b4c953eaeb4ef1637.png 480w,https://asset.jmir.pub/assets/43240216b0bf198b4c953eaeb4ef1637.png 960w,https://asset.jmir.pub/assets/43240216b0bf198b4c953eaeb4ef1637.png 1920w,https://asset.jmir.pub/assets/43240216b0bf198b4c953eaeb4ef1637.png 2500w)
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