COLD: Annotation scheme and evaluation data set for complex offensive language in English

This paper presents a new, extensible annotation scheme for offensive language data sets. The annotation scheme expands coverage beyond fairly straightforward cases of offensive language to address several cases of complex, implicit, and/or pragmatically-triggered offensive language. We apply the annotation scheme to create a new Complex Offensive Language Data Set for English ( COLD-EN ). The primary purpose of this data set is to diagnose how well systems for automatic detection of abusive language are able to classify three types of complex offensive language: reclaimed slurs, offensive utterances containing pejorative adjectival nominalizations (and no slur terms), and utterances conveying offense through linguistic distancing. COLD offers a straightforward framework for error analysis. Our vision is that researchers will use this data set to diagnose the strengths and weaknesses of their offensive language detection systems. In this paper, we diagnose some strengths and weaknesses of a top-performing offensive language detection system by: a) using it to classify COLD , and b) investigating its performance on the 10 fine-grained categories supported by our annotation scheme. We evaluate the system’s performance when trained on five different standard data sets for offensive language detection. Systems trained on different data sets have different strengths and weaknesses, with most performing poorly on the phenomena of reclaimed slurs and pejorative nominalizations. NOTE: This paper contains sensitive and offensive material. The offensive materials are part of a complex puzzle we wish to better understand; they appear in the form of lightly-censored slurs and degrading insults. We do not condone this type of language, nor does it reflect the attitudes or beliefs of the authors.