Olaf Köller

1 article
📚 Search for Köller in CompPile →
  1. Assessing Writing Jan 2020
    Linking TOEFL iBT® writing rubrics to CEFR levels: Cut scores and validity evidence from a standard setting study ↗
    Johanna Fleckenstein; Stefan Keller; Maleika Krüger; Richard J. Tannenbaum; Olaf Köller
    assessment multilingual writers
    doi:10.1016/j.asw.2019.100420