Automatic vs. crowdsourced sentiment analysis

Ria Mae Borromeo, Motomichi Toyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

18 Citations (Scopus)


Due to the amount of work needed in manual sentiment analysis of written texts, techniques in automatic sentiment analysis have been widely studied. However, compared to manual sentiment analysis, the accuracy of automatic systems range only from low to medium. In this study, we solve a sentiment analysis problem by crowdsourcing. Crowdsourcing is a problem solving approach that uses the cognitive power of people to achieve specific computational goals. It is implemented through an online platform, which can either be paid or volunteer-based. We deploy crowdsourcing applications in paid and volunteer-based platforms to classify teaching evaluation comments from students. We present a comparison of the results produced by crowdsourcing, manual sentiment analysis, and an existing automatic sentiment analysis system. Our findings show that the crowdsourced sentiment analysis in both paid and volunteer-based platforms are considerably more accurate than the automatic sentiment analysis algorithm but still fail to achieve high accuracy compared to the manual method. To improve accuracy, the effect of increasing the size of the crowd could be explored in the future.

Original languageEnglish
Title of host publicationACM International Conference Proceeding Series
EditorsBipin C. Desai, Motomichi Toyama
PublisherAssociation for Computing Machinery
Number of pages6
ISBN (Electronic)9781450334143
Publication statusPublished - 2015 Jul 13
Event19th International Database Engineering and Applications Symposium, IDEAS 2015 - Yokohama, Japan
Duration: 2015 Jul 132015 Jul 15

Publication series

NameACM International Conference Proceeding Series


Other19th International Database Engineering and Applications Symposium, IDEAS 2015


  • Crowdsourcing
  • Sentiment analysis
  • Text tagging

ASJC Scopus subject areas

  • Software
  • Human-Computer Interaction
  • Computer Vision and Pattern Recognition
  • Computer Networks and Communications


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