Search Results for author: Andrew E. Waters

Found 8 papers, 0 papers with code

Attention Word Embedding

no code implementations COLING 2020 Shashank Sonkar, Andrew E. Waters, Richard G. Baraniuk

Word embedding models learn semantically rich vector representations of words and are widely used to initialize natural processing language (NLP) models.

Sentence Word Similarity

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

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

SPRITE: A Response Model For Multiple Choice Testing

no code implementations12 Jan 2015 Ryan Ning, Andrew E. Waters, Christoph Studer, Richard G. Baraniuk

In this work, we propose a novel methodology for unordered categorical IRT that we call SPRITE (short for stochastic polytomous response item model) that: (i) analyzes both ordered and unordered categories, (ii) offers interpretable outputs, and (iii) provides improved data fitting compared to existing models.

Multiple-choice

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

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

SpaRCS: Recovering low-rank and sparse matrices from compressive measurements

no code implementations NeurIPS 2011 Andrew E. Waters, Aswin C. Sankaranarayanan, Richard Baraniuk

We consider the problem of recovering a matrix $\mathbf{M}$ that is the sum of a low-rank matrix $\mathbf{L}$ and a sparse matrix $\mathbf{S}$ from a small set of linear measurements of the form $\mathbf{y} = \mathcal{A}(\mathbf{M}) = \mathcal{A}({\bf L}+{\bf S})$.

Compressive Sensing Matrix Completion +1

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