Identifying Implicit Links in CSCL Chats Using String Kernels and Neural Networks

Mihai Masala, Stefan Ruseti, Gabriel Gutu-Robu, Traian Rebedea, Mihai Dascalu, Stefan Trausan-Matu

Research output: Chapter in Book/Report/Conference proceedingConference Article in proceedingAcademicpeer-review


Chat conversations between more than two participants are often used in Computer Supported Collaborative Learning (CSCL) scenarios because they enhance collaborative knowledge sharing and sustain creativity. However, multi-participant chats are more difficult to follow and analyze due to the complex ways in which different discussion threads and topics can interact. This paper introduces a novel method based on neural networks for detecting implicit links that uses features computed with string kernels and word embeddings. In contrast to previous experiments with an accuracy of 33%, we obtained a considerable increase to 44% for the same dataset. Our method represents an alternative to more complex deep neural networks that cannot be properly used due to overfitting on limited training data.
Original languageEnglish
Title of host publicationArtificial Intelligence in Education - 19th International Conference, AIED 2018, Proceedings
Subtitle of host publication19th International Conference, AIED 2018, London, UK, June 27–30, 2018, Proceedings, Part II
EditorsRose Luckin, Kaska Porayska-Pomsta, Benedict du Boulay, Manolis Mavrikis, Carolyn Penstein Rosé, Bruce McLaren, Roberto Martinez-Maldonado, H. Ulrich Hoppe
Place of PublicationCham
Number of pages5
ISBN (Electronic)9783319938462
ISBN (Print)9783319938455
Publication statusPublished - Jun 2018
Externally publishedYes
EventArtificial Intelligence in Education: 19th International Conference, AIED 2018, London, UK, June 27 – 20, 2018 - London, United Kingdom
Duration: 27 Jun 201830 Jun 2018

Publication series

SeriesLecture Notes in Computer Science


ConferenceArtificial Intelligence in Education
Abbreviated titleAIED 2018
Country/TerritoryUnited Kingdom
Internet address


  • Computer Supported Collaborative Learning
  • Implicit links
  • Natural Language Processing
  • Neural networks
  • String kernels


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