SentiStrength is a sentiment analysis tool developed by Mike Thelwall etc [^1] in 2010. In this manual, we will first briefly introduce this tool, describe its functions, and show how to use this tool. More details can be found in its paper and SentiStrength's official website [^2].
SentiStrength is a tool developed from comments on social networking sites (MySpace [^3]). Its core function is to use dictionary-based algorithms to analyse sentiment for text. Specifically, it first assigns priori sentimental scores to words according to the sentiment dictionary, and then adjusts the assignation result with several heuristic rules. It can give a sentimental score pair for each input text, where represents the positive score of the text, and represents the negative score. The scale and meaning for and are as below: