AUTHOR=Moeller Julia TITLE=A word on standardization in longitudinal studies: don't JOURNAL=Frontiers in Psychology VOLUME=6 YEAR=2015 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2015.01389 DOI=10.3389/fpsyg.2015.01389 ISSN=1664-1078