DeepQR: Neural-based Quality Ratings for Learnersourced Multiple-Choice Questions
This work addresses the problem of efficiently evaluating question quality in online educational platforms for educators and learners, representing an incremental improvement over existing methods.
The paper tackled automated quality rating for learnersourced multiple-choice questions by proposing DeepQR, a neural network model that outperformed six comparative models on datasets from eight university courses.
Automated question quality rating (AQQR) aims to evaluate question quality through computational means, thereby addressing emerging challenges in online learnersourced question repositories. Existing methods for AQQR rely solely on explicitly-defined criteria such as readability and word count, while not fully utilising the power of state-of-the-art deep-learning techniques. We propose DeepQR, a novel neural-network model for AQQR that is trained using multiple-choice-question (MCQ) datasets collected from PeerWise, a widely-used learnersourcing platform. Along with designing DeepQR, we investigate models based on explicitly-defined features, or semantic features, or both. We also introduce a self-attention mechanism to capture semantic correlations between MCQ components, and a contrastive-learning approach to acquire question representations using quality ratings. Extensive experiments on datasets collected from eight university-level courses illustrate that DeepQR has superior performance over six comparative models.