AUTHOR=McGregor Alison TITLE=Commentary: “Vowel Quality and Direction of Stress Shift in a Predictive Model Explaining the Varying Impact of Misplaced Word Stress: Evidence From English” and “Exploring the Complexity of the L2 Intonation System: An Acoustic and Eye-Tracking Study” JOURNAL=Frontiers in Communication VOLUME=6 YEAR=2021 URL=https://www.frontiersin.org/journals/communication/articles/10.3389/fcomm.2021.721053 DOI=10.3389/fcomm.2021.721053 ISSN=2297-900X