Children and Groove 1 RUNNING HEAD: Children and Groove 1 2 To appear in Developmental Science 3 4 Musical groove shapes children’s free dancing 5 6 Haley E. Kragness, Lucy Anderson, Ester Chow, Mark Schmuckler, & Laura K. Cirelli 7 University of Toronto Scarborough, Department of Psychology, Toronto, ON, Canada 8 9 10 Data availability statement: Where permission granted, the raw data (videos) from this 11 experiment are stored at Databrary.com (volume 1129). The aggregate, anonymized data and 12 code will be stored in an Open Science Framework repository for independent verification of the 13 results (https://osf.io/j8tkr/) 14 Funding statement: This research was funded by an NSERC Discovery Grant (RGPIN-2019- 15 04689) to LKC 16 Conflict of interest disclosure: The authors have no conflicts of interest to report. 17 Ethics approval statement: All procedures were approved by the University of Toronto 18 Research Ethics Board. 19 Acknowledgements: Our thanks to Diya Ahmad, Vishnija Asokan, Joey Ball, Emma Chan, 20 Sydney Chiu, Matthew Eitel, Jeffnie Fernando, Jaemin Hwang, Lanyi Lin, Parjanya Parikh and 21 Mikayla Samuel for their involvement in participant recruitment, running, and annotation. 22 Additional thanks to Calpanaa Jegatheeswaran for helpful conversations in a pilot project. 23 24