“…Importantly, these behavioral changes have been linked to later language abilities, including productive vocabulary and vocabulary growth up to 30 months of age ( Brooks and Meltzoff, 2008 ; Kuhl et al, 2008 , 2005 ; Morales et al, 2000 , 1998 ; Morin-Lessard et al, 2021 ; Rivera-Gaxiola et al, 2005 ; Singh et al, 2012 ; Tsao et al, 2004 ), language and preliteracy skills ( Cardillo, 2010 ; Cardillo Lebedeva and Kuhl, 2009 ), general communication skills at 5 years of age ( Morin-Lessard et al, 2021 ), and expressive grammar skills at 6 years of age ( Zhao et al, 2021 ). Thus there is strong evidence that these behaviorally observed changes are important for the development of later, more advanced language skills.…”