Terminology

• topic: a multinomial distribution over words that represents a coherent concept in text.
• aspect: a multinomial distribution over words that represents a more speci c topic in reviews, for example,"lens" in camera reviews.
• senti-aspect: a multinomial distribution over words that represents a pair of aspect and sentiment, for example, "screen, positive" in a laptop review.
• affective word: a word that expresses a feeling, for example "satisfied", "disappointed".
• evaluative word: a word that expresses sentiment by evaluating an aspect, for example, "excellent", "nice".
• general evaluative word: an evaluative word that expresses a consistent sentiment every time it is used, for example, "good", "bad".
• aspect-specific evaluative word: an evaluative word that may express di erent sentiments depending on the aspect, for example, a "small" font size on a monitor that is hard to read vs. a "small" vacuum that is portable.
• sentiment word: a word that conveys sentiment. It is either an a ective word, general evaluative word, or aspect-speci c evaluative word.

source: Jo and Oh, WSDM'11.