Search Results for author: Min Chi

Found 18 papers, 5 papers with code

An Offline Time-aware Apprenticeship Learning Framework for Evolving Reward Functions

no code implementations15 May 2023 Xi Yang, Ge Gao, Min Chi

Apprenticeship learning (AL) is a process of inducing effective decision-making policies via observing and imitating experts' demonstrations.

Decision Making

Bridging Declarative, Procedural, and Conditional Metacognitive Knowledge Gap Using Deep Reinforcement Learning

no code implementations23 Apr 2023 Mark Abdelshiheed, John Wesley Hostetter, Tiffany Barnes, Min Chi

This work leverages Deep Reinforcement Learning (DRL) in providing adaptive metacognitive interventions to bridge the gap between the three knowledge types and prepare students for future learning across Intelligent Tutoring Systems (ITSs).

reinforcement-learning

Mixing Backward- with Forward-Chaining for Metacognitive Skill Acquisition and Transfer

no code implementations18 Mar 2023 Mark Abdelshiheed, John Wesley Hostetter, Xi Yang, Tiffany Barnes, Min Chi

In this work, students were trained on a logic tutor that supports a default forward-chaining (FC) and a backward-chaining (BC) strategy.

The Power of Nudging: Exploring Three Interventions for Metacognitive Skills Instruction across Intelligent Tutoring Systems

no code implementations18 Mar 2023 Mark Abdelshiheed, John Wesley Hostetter, Preya Shabrina, Tiffany Barnes, Min Chi

Deductive domains are typical of many cognitive skills in that no single problem-solving strategy is always optimal for solving all problems.

HOPE: Human-Centric Off-Policy Evaluation for E-Learning and Healthcare

no code implementations18 Feb 2023 Ge Gao, Song Ju, Markel Sanz Ausin, Min Chi

Reinforcement learning (RL) has been extensively researched for enhancing human-environment interactions in various human-centric tasks, including e-learning and healthcare.

Off-policy evaluation

Variational Latent Branching Model for Off-Policy Evaluation

1 code implementation28 Jan 2023 Qitong Gao, Ge Gao, Min Chi, Miroslav Pajic

In this work, we propose the variational latent branching model (VLBM) to learn the transition function of MDPs by formulating the environmental dynamics as a compact latent space, from which the next states and rewards are then sampled.

Off-policy evaluation Variational Inference

Investigating the Impact of Backward Strategy Learning in a Logic Tutor: Aiding Subgoal Learning towards Improved Problem Solving

no code implementations27 Jul 2022 Preya Shabrina, Behrooz Mostafavi, Mark Abdelshiheed, Min Chi, Tiffany Barnes

Backward problem-solving strategy is closely related to the process of subgoaling, where problem solving iteratively refines the goal into a new subgoal to reduce difficulty.

Enhancing a Student Productivity Model for Adaptive Problem-Solving Assistance

no code implementations7 Jul 2022 Mehak Maniktala, Min Chi, Tiffany Barnes

In this paper, we present a novel data-driven approach to incorporate students' hint usage in predicting their need for help.

Code-DKT: A Code-based Knowledge Tracing Model for Programming Tasks

1 code implementation7 Jun 2022 Yang Shi, Min Chi, Tiffany Barnes, Thomas Price

Knowledge tracing (KT) models are a popular approach for predicting students' future performance at practice problems using their prior attempts.

Knowledge Tracing

Making a (Counterfactual) Difference One Rationale at a Time

1 code implementation NeurIPS 2021 Mitchell Plyler, Michael Green, Min Chi

Rationales, snippets of extracted text that explain an inference, have emerged as a popular framework for interpretable natural language processing (NLP).

counterfactual Data Augmentation

Time-Aware Q-Networks: Resolving Temporal Irregularity for Deep Reinforcement Learning

no code implementations6 May 2021 Yeo Jin Kim, Min Chi

Much of DRL work has been focused on sequences of events with discrete time steps and ignores the irregular time intervals between consecutive events.

reinforcement-learning Reinforcement Learning (RL) +1

InferNet for Delayed Reinforcement Tasks: Addressing the Temporal Credit Assignment Problem

no code implementations2 May 2021 Markel Sanz Ausin, Hamoon Azizsoltani, Song Ju, Yeo Jin Kim, Min Chi

Overall, our results show that the effectiveness of InferNet is robust against noisy reward functions and is an effective add-on mechanism for solving temporal CAP in a wide range of RL tasks, from classic RL simulation environments to a real-world RL problem and for both online and offline learning.

Atari Games Offline RL +1

An Adversarial Domain Separation Framework for Septic Shock Early Prediction Across EHR Systems

no code implementations26 Oct 2020 Farzaneh Khoshnevisan, Min Chi

We evaluate our framework for early diagnosis of an extremely challenging condition, septic shock, using two real-world EHRs from distinct medical systems in the U. S.

Decision Making Domain Adaptation +1

Extending the Hint Factory for the assistance dilemma: A novel, data-driven HelpNeed Predictor for proactive problem-solving help

no code implementations8 Oct 2020 Mehak Maniktala, Christa Cody, Amy Isvik, Nicholas Lytle, Min Chi, Tiffany Barnes

A core problem in solving the assistance dilemma is the need to discover when students are unproductive so that the tutor can intervene.

Avoiding Help Avoidance: Using Interface Design Changes to Promote Unsolicited Hint Usage in an Intelligent Tutor

no code implementations28 Sep 2020 Mehak Maniktala, Christa Cody, Tiffany Barnes, Min Chi

Within intelligent tutoring systems, considerable research has investigated hints, including how to generate data-driven hints, what hint content to present, and when to provide hints for optimal learning outcomes.

Clustering

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