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UBC Theses and Dissertations
Classifying long-term traits from action and eye-tracking data for personalized XAI in an intelligent tutoring system Graham, Liam
Abstract
There is increasing evidence that, when interacting with an AI system, users may benefit from having personalized explanations of the system’s behavior. Providing such personalized explanations requires that the AI system can assess user properties that are relevant for personalization. In the absence of prior information on such user properties, the system must rely on being able to predict them during the course of the interaction, in order to deliver personalized explanations as needed. In this thesis, we investigate the feasibility of predicting three user traits – conscientiousness, need for cognition and reading proficiency – that have been shown to impact the effectiveness of explanations when users interact with an Intelligent Tutoring System (ITS). We discuss results on training machine learning models on eye-tracking data, action data and a combination of both as users interact with the ITS. For the eye-tracking data, we test features generated from summative statistics of a user’s gaze, and those from patterns in sequences of areas of interest generated from a user’s gaze. We provide a detailed analysis of the relative efficacy of such models, and show that prediction above baseline classifiers is possible even during early stages of the interaction, which is crucial for the timely personalization of explanations. Lastly, we examine the feature permutation importance of our best models to gain insight into how they work and relate to literature.
Item Metadata
Title |
Classifying long-term traits from action and eye-tracking data for personalized XAI in an intelligent tutoring system
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Creator | |
Supervisor | |
Publisher |
University of British Columbia
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Date Issued |
2023
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Description |
There is increasing evidence that, when interacting with an AI system, users may benefit
from having personalized explanations of the system’s behavior. Providing such personalized
explanations requires that the AI system can assess user properties that are relevant for
personalization. In the absence of prior information on such user properties, the system must rely
on being able to predict them during the course of the interaction, in order to deliver personalized
explanations as needed. In this thesis, we investigate the feasibility of predicting three user traits
– conscientiousness, need for cognition and reading proficiency – that have been shown to impact
the effectiveness of explanations when users interact with an Intelligent Tutoring System (ITS).
We discuss results on training machine learning models on eye-tracking data, action data and a
combination of both as users interact with the ITS. For the eye-tracking data, we test features
generated from summative statistics of a user’s gaze, and those from patterns in sequences of areas
of interest generated from a user’s gaze. We provide a detailed analysis of the relative efficacy of
such models, and show that prediction above baseline classifiers is possible even during early
stages of the interaction, which is crucial for the timely personalization of explanations. Lastly, we
examine the feature permutation importance of our best models to gain insight into how they work
and relate to literature.
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Genre | |
Type | |
Language |
eng
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Date Available |
2023-01-24
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0423553
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2023-05
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Campus | |
Scholarly Level |
Graduate
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International