Master’s Thesis Presentation • Artificial Intelligence — Affect Lexicon Induction for the Github Subculture Using Distributed Word RepresentationsExport this event to calendar

Friday, November 2, 2018 — 10:00 AM EDT

Yuwei Jiao, Master’s candidate
David R. Cheriton School of Computer Science

Sentiments and emotions play essential roles in small group interactions, especially in self-organized collaborative groups. Many people view emotions as universal constructs; however, cultural differences exist in some aspects of emotions. Understanding the features of emotion space in small group cultures provides essential insights into the dynamics of self-organized collaborations. However, due to the limit of carefully human annotated data, it is hard to describe emotional divergences across cultures.

In this thesis, we present a new approach to inspect cultural differences on the level of sentiments and compare subculture with the general social environment. We use Github, a collaborative software development network, as an example of self-organized subculture. First, we train word embeddings on large corpora and do embedding alignment using linear transformation method. Then we model finer-grained human emotions in the Evaluation-Potency-Activity (EPA) space and extend subculture EPA lexicon with two-dense-layered neural networks. Finally, we apply Long Short-Term Memory (LSTM) network to analyze the identities’ sentiments triggered by event-based sentences. 

We evaluate the predicted EPA lexicon for Github community using a recently collected dataset, and the result proves our approach could capture subtle changes in affective dimensions. Moreover, our induced sentiment lexicon shows individuals from two environments have different understandings to emotion-related words and phrases but agree on nouns and adjectives. The sentiment features of “Github culture” could explain that people in self-organized groups tend to reduce personal emotions to improve group collaboration.

Location 
DC - William G. Davis Computer Research Centre
2314
200 University Avenue West

Waterloo, ON N2L 3G1
Canada

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