AUTHOR=Noll-Hussong Michael TITLE=Of waves and troughs JOURNAL=Frontiers in Psychology VOLUME=5 YEAR=2014 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2014.00197 DOI=10.3389/fpsyg.2014.00197 ISSN=1664-1078