AUTHOR=Dowker Ann , De Smedt Bert , Desoete Annemie TITLE=Editorial: Individual Differences in Arithmetical Development JOURNAL=Frontiers in Psychology VOLUME=10 YEAR=2019 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2019.02672 DOI=10.3389/fpsyg.2019.02672 ISSN=1664-1078