Explainable Classification of EEG Data for an Active Touch Task Using Shapley Values

Haneen Alsuradi, Wanjoo Park, Mohamad Eid

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

Abstract

Machine learning has been used in the last decade to solve many problems in the haptics field. In particular, EEG data that is recorded during haptic interactions was used to train machine learning (ML) models to answer questions that are of interest to the neurohaptics community. However, the behavior of machine learning models in taking out their decisions is treated as black box hindering the interpretability of these decisions. In this paper, we used Shapley values, a concept from game theory, to explain the behavior of a tree-based classifier model in classifying electroencephalography data that was collected during an interaction with a surface haptic device under two conditions: with and without tactile feedback. We trained a tree-based ML model to classify data based on the presence or absence of tactile feedback. Using Shapley values, we identified the features (across and within channels) that contribute the most to the classification decision. Results showed channel AF3 and neural activity after 700 ms from the onset contributed the most in recognizing tactile feedback in the interaction. This study demonstrates the use of explainable machine learning in the field of Neurohaptics.

Original languageEnglish (US)
Title of host publicationHCI International 2020 – Late Breaking Papers
Subtitle of host publicationMultimodality and Intelligence - 22nd HCI International Conference, HCII 2020, Proceedings
EditorsConstantine Stephanidis, Masaaki Kurosu, Helmut Degen, Lauren Reinerman-Jones
PublisherSpringer Science and Business Media Deutschland GmbH
Pages406-416
Number of pages11
ISBN (Print)9783030601164
DOIs
StatePublished - 2020
Event22nd International Conference on Human Computer Interaction,HCII 2020 - Copenhagen, Denmark
Duration: Jul 19 2020Jul 24 2020

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume12424 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference22nd International Conference on Human Computer Interaction,HCII 2020
CountryDenmark
CityCopenhagen
Period7/19/207/24/20

Keywords

  • EEG
  • Explainable machine learning
  • Haptics
  • Neurohaptics

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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