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Automatic Extraction of Cognitive Features from Gaze Data

  • Abhijit MishraEmail author
  • Pushpak Bhattacharyya
Chapter
Part of the Cognitive Intelligence and Robotics book series (CIR)

Abstract

Cognitive NLP systems—i.e., NLP systems that make use of behavioral data—augment traditional text-based features with cognitive features extracted from eye-movement patterns, EEG signals, brain imaging, etc. Such extraction of features has been typically manual, as we have seen in the previous chapter. We now contend that manual extraction of features is not good enough to tackle text subtleties that characteristically prevail in complex classification tasks like sentiment analysis and sarcasm detection, and that even the extraction and choice of features should be delegated to the learning system. We introduce a framework to automatically extract cognitive features from the eye-movement data of human readers reading the text and use them as features along with textual features for the tasks of sentiment polarity and sarcasm detection. Our proposed framework is based on Convolutional Neural Network (CNN). The CNN learns features from both gaze and text and uses them to classify the input text. We test our technique on published sentiment and sarcasm labeled datasets, enriched with gaze information, to show that using a combination of automatically learned text and gaze features yields better classification performance over (i) CNN-based systems that rely on text input alone and (ii) existing systems that rely on handcrafted gaze and textual features.

Keywords

Gaze Data Sarcasm Detection Convolutional Neural Network (CNN) Gaze Information Sentiment Polarity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.India Research LabIBM ResearchBangaloreIndia
  2. 2.Indian Institute of Technology PatnaPatnaIndia

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