Determining the attitude of a speaker or writer with respect to some topic or the overall contextual polarity of a document. A basic task in sentiment analysis is classifying the polarity of a given text as positive, negative, or neutral. e.g. Text Analysis 101: Sentiment analysis in Tableau & R.
Identifying, analysing and reporting patterns (themes) within data. A theme captures something important about the data in relation to the research question. - e.g. Using thematic analysis in psychology