AUTHOR=Schmidt Timo T. , Berkemeyer Hendrik TITLE=The Altered States Database: Psychometric Data of Altered States of Consciousness JOURNAL=Frontiers in Psychology VOLUME=9 YEAR=2018 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2018.01028 DOI=10.3389/fpsyg.2018.01028 ISSN=1664-1078