AUTHOR=Staller Mario S. , Koerner Swen TITLE=Commentary: Observational Behavior Assessment for Psychological Competencies in Police Officers: A Proposed Methodology for Instrument Development JOURNAL=Frontiers in Psychology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2021.686576 DOI=10.3389/fpsyg.2021.686576 ISSN=1664-1078