Search Results for author: Andrew S. Lan

Found 19 papers, 4 papers with code

Balancing Test Accuracy and Security in Computerized Adaptive Testing

1 code implementation18 May 2023 Wanyong Feng, Aritra Ghosh, Stephen Sireci, Andrew S. Lan

Computerized adaptive testing (CAT) is a form of personalized testing that accurately measures students' knowledge levels while reducing test length.

Bilevel Optimization Question Selection

Math Word Problem Generation with Mathematical Consistency and Problem Context Constraints

no code implementations EMNLP 2021 Zichao Wang, Andrew S. Lan, Richard G. Baraniuk

We study the problem of generating arithmetic math word problems (MWPs) given a math equation that specifies the mathematical computation and a context that specifies the problem scenario.

Math Question Generation

Option Tracing: Beyond Binary Knowledge Tracing

1 code implementation11 Dec 2020 Aritra Ghosh, Andrew S. Lan

This paper details our solutions to Tasks 1&2 of the NeurIPS 2020 Education Challenge. 1 Knowledge tracing, a family of methods to estimate each student’s mastery levels on skills/knowledge components from their past responses to assessment questions, is useful for progress monitoring, personalization, and helping teachers to deliver personalized and targeted feedback to students to improve their learning outcomes.

Knowledge Tracing Multiple-choice

Context-Aware Attentive Knowledge Tracing

1 code implementation24 Jul 2020 Aritra Ghosh, Neil Heffernan, Andrew S. Lan

We also conduct several case studies and show that AKT exhibits excellent interpretability and thus has potential for automated feedback and personalization in real-world educational settings.

Knowledge Tracing

qDKT: Question-centric Deep Knowledge Tracing

no code implementations25 May 2020 Shashank Sonkar, Andrew E. Waters, Andrew S. Lan, Phillip J. Grimaldi, Richard G. Baraniuk

Knowledge tracing (KT) models, e. g., the deep knowledge tracing (DKT) model, track an individual learner's acquisition of skills over time by examining the learner's performance on questions related to those skills.

Knowledge Tracing Language Modelling

MSE-Optimal Neural Network Initialization via Layer Fusion

1 code implementation28 Jan 2020 Ramina Ghods, Andrew S. Lan, Tom Goldstein, Christoph Studer

To address this issue, a variety of methods that rely on random parameter initialization or knowledge distillation have been proposed in the past.

General Classification Knowledge Distillation

IdeoTrace: A Framework for Ideology Tracing with a Case Study on the 2016 U.S. Presidential Election

no code implementations21 May 2019 Indu Manickam, Andrew S. Lan, Gautam Dasarathy, Richard G. Baraniuk

We apply this framework to the last two months of the election period for a group of 47508 Twitter users and demonstrate that both liberal and conservative users became more polarized over time.

An Estimation and Analysis Framework for the Rasch Model

no code implementations ICML 2018 Andrew S. Lan, Mung Chiang, Christoph Studer

The Rasch model is widely used for item response analysis in applications ranging from recommender systems to psychology, education, and finance.

Collaborative Filtering Recommendation Systems

Linear Spectral Estimators and an Application to Phase Retrieval

no code implementations ICML 2018 Ramina Ghods, Andrew S. Lan, Tom Goldstein, Christoph Studer

Phase retrieval refers to the problem of recovering real- or complex-valued vectors from magnitude measurements.

Retrieval

Linearized Binary Regression

no code implementations1 Feb 2018 Andrew S. Lan, Mung Chiang, Christoph Studer

We showcase the efficacy of our methods and results for a number of synthetic and real-world datasets, which demonstrates that linearized binary regression finds potential use in a variety of inference, estimation, signal processing, and machine learning applications that deal with binary-valued observations or measurements.

regression

Data-Mining Textual Responses to Uncover Misconception Patterns

no code implementations24 Mar 2017 Joshua J. Michalenko, Andrew S. Lan, Richard G. Baraniuk

An important, yet largely unstudied, problem in student data analysis is to detect misconceptions from students' responses to open-response questions.

Misconceptions

Mathematical Language Processing: Automatic Grading and Feedback for Open Response Mathematical Questions

no code implementations18 Jan 2015 Andrew S. Lan, Divyanshu Vats, Andrew E. Waters, Richard G. Baraniuk

Our data-driven framework for mathematical language processing (MLP) leverages solution data from a large number of learners to evaluate the correctness of their solutions, assign partial-credit scores, and provide feedback to each learner on the likely locations of any errors.

Clustering

Quantized Matrix Completion for Personalized Learning

no code implementations18 Dec 2014 Andrew S. Lan, Christoph Studer, Richard G. Baraniuk

The recently proposed SPARse Factor Analysis (SPARFA) framework for personalized learning performs factor analysis on ordinal or binary-valued (e. g., correct/incorrect) graded learner responses to questions.

Matrix Completion

Tag-Aware Ordinal Sparse Factor Analysis for Learning and Content Analytics

no code implementations18 Dec 2014 Andrew S. Lan, Christoph Studer, Andrew E. Waters, Richard G. Baraniuk

SPARse Factor Analysis (SPARFA) is a novel framework for machine learning-based learning analytics, which estimates a learner's knowledge of the concepts underlying a domain, and content analytics, which estimates the relationships among a collection of questions and those concepts.

BIG-bench Machine Learning Collaborative Filtering +1

Time-varying Learning and Content Analytics via Sparse Factor Analysis

no code implementations19 Dec 2013 Andrew S. Lan, Christoph Studer, Richard G. Baraniuk

We propose SPARFA-Trace, a new machine learning-based framework for time-varying learning and content analytics for education applications.

Collaborative Filtering Knowledge Tracing

Joint Topic Modeling and Factor Analysis of Textual Information and Graded Response Data

no code implementations8 May 2013 Andrew S. Lan, Christoph Studer, Andrew E. Waters, Richard G. Baraniuk

In order to better interpret the estimated latent concepts, SPARFA relies on a post-processing step that utilizes user-defined tags (e. g., topics or keywords) available for each question.

BIG-bench Machine Learning

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