The general category of research is sentiment analysis: https://en.wikipedia.org/wiki/Sentiment_analysis https://en.wikipedia.org/wiki/Sentiment_analysis Howe

The general category of research is sentiment analysis: https://en.wikipedia.org/wiki/Sentiment_analysis https://en.wikipedia.org/wiki/Sentiment_analysis However that's as much as I know. If you get lucky maybe an expert or user of these tools will see your post!