@inproceedings{klerke-etal-2018-grotoco,
    title = "Grotoco@{SLAM}: Second Language Acquisition Modeling with Simple Features, Learners and Task-wise Models",
    author = "Klerke, Sigrid  and
      Mart{\'i}nez Alonso, H{\'e}ctor  and
      Plank, Barbara",
    editor = "Tetreault, Joel  and
      Burstein, Jill  and
      Kochmar, Ekaterina  and
      Leacock, Claudia  and
      Yannakoudakis, Helen",
    booktitle = "Proceedings of the Thirteenth Workshop on Innovative Use of {NLP} for Building Educational Applications",
    month = jun,
    year = "2018",
    address = "New Orleans, Louisiana",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/Author-page-Marten-During-lu/W18-0523/",
    doi = "10.18653/v1/W18-0523",
    pages = "206--211",
    abstract = "We present our submission to the 2018 Duolingo Shared Task on Second Language Acquisition Modeling (SLAM). We focus on evaluating a range of features for the task, including user-derived measures, while examining how far we can get with a simple linear classifier. Our analysis reveals that errors differ per exercise format, which motivates our final and best-performing system: a task-wise (per exercise-format) model."
}