Sentiment Analysis

• derive aggregated information from a corpus of subjective thoughts, beliefs, perceptions, emotions and opinions
  • any user-generated data
  • can be used in Social Media Analytics
• text classification task
  • positive, negative, neutral

Emotion detection

similarities to Sentiment Analysis but finer-grained; cast as a multi-class classification task.

see Plutchik’s wheel

Approaches

• Lexicon/dictionary + rules based (Symbolic)
  • match words or group of words and assign some score
• statistical/ML based