AUTHOR=Pohl Steffi , von Davier Matthias TITLE=Commentary: On the Importance of the Speed-Ability Trade-Off When Dealing With Not Reached Items JOURNAL=Frontiers in Psychology VOLUME=9 YEAR=2018 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2018.01988 DOI=10.3389/fpsyg.2018.01988 ISSN=1664-1078