Semi-supervised Learning Method for Adjusting Biased Item Difficulty Estimates Caused by Nonignorable Missingness under 2PL-IRT Model.
Kang XuePublished in: EDM (2020)
Keyphrases
- semi supervised learning
- probabilistic model
- unsupervised learning
- semi supervised classification
- missing data
- prior knowledge
- similarity measure
- semi supervised
- model selection
- transductive support vector machine
- graph based semi supervised learning
- learning models
- labeled data
- em algorithm
- training data
- machine learning
- data sets
- natural language processing
- supervised learning
- active learning
- test data
- co training
- feature extraction
- boosting framework
- manifold regularization
- e learning