Crowdsourcing Subjective Tasks: The Case Study of Understanding Toxicity in Online Discussions

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Abstract

Discussing things you care about can be difficult, especially via online platforms, where sharing your opinion leaves you open to the real and immediate threats of abuse and harassment. Due to these threats, people stop expressing themselves and give up on seeking different opinions. Recent research efforts focus on examining the strengths and weaknesses (e.g. potential unintended biases) of using machine learning as a support tool to facilitate safe space for online discussions; for example, through detecting various types of negative online behaviors such as hate speech, online harassment, or cyberbullying. Typically, these efforts build upon sentiment analysis or spam detection in text. However, the toxicity of the language could be a strong indicator for the intensity of the negative behavior. In this paper, we study the topic of toxicity in online conversations by addressing the problems of subjectivity, bias, and ambiguity inherent in this task. We start with an analysis of the characteristics of subjective assessment tasks (e.g. relevance judgment, toxicity judgment, sentiment assessment, etc). Whether we perceive something as relevant or as toxic can be influenced by almost infinite amounts of prior or current context, e.g. culture, background, experiences, education, etc. We survey recent work that tries to understand this phenomenon, and we outline a number of open questions and challenges which shape the research perspectives in this multi-disciplinary field.

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