Quantitative Analysis of Bloggers Collective Behavior Powered by Emotions

TL;DR

This study combines statistical physics and machine learning to analyze how emotions expressed in comments influence the formation and evolution of online user communities, revealing critical emotional dynamics and community behaviors.

Contribution

It introduces a novel framework integrating network analysis and emotion classification to uncover emotional influence on collective online behaviors.

Findings

Negative emotions correlate with community evolution.

Emotional comment avalanches show self-organized criticality.

Active users critically influence emotional states.

Abstract

Large-scale data resulting from users online interactions provide the ultimate source of information to study emergent social phenomena on the Web. From individual actions of users to observable collective behaviors, different mechanisms involving emotions expressed in the posted text play a role. Here we combine approaches of statistical physics with machine-learning methods of text analysis to study emergence of the emotional behavior among Web users. Mapping the high-resolution data from digg.com onto bipartite network of users and their comments onto posted stories, we identify user communities centered around certain popular posts and determine emotional contents of the related comments by the emotion-classifier developed for this type of texts. Applied over different time periods, this framework reveals strong correlations between the excess of negative emotions and the evolution of communities. We observe avalanches of emotional comments exhibiting significant self-organized critical behavior and temporal correlations. To explore robustness of these critical states, we design a network automaton model on realistic network connections and several control parameters, which can be inferred from the dataset. Dissemination of emotions by a small fraction of very active users appears to critically tune the collective states.