“…Admittedly, there are other measures, such as sensitivity, that capture parents' attuned and adequate reactions to children's signals using a global rating scale. Although these measures have been found to similarly predict children's language outcomes (e.g., Attig & Weinert, 2020;Bruce et al, 2022;Elsabbagh et al, 2013;Leigh et al, 2011;Murray et al, 2016) SR interactions are often assessed as parent responses (usually the first response) that occur within a specified time window (e.g., 2, 3, or 5 seconds) following every child act (e.g., look to toy, look to parent, gestures, vocalizations) and are semantically relevant for the child act (e.g., labeling the toy the child looks to, imitating the child's vocalization). Most studies adopt a 2 or 5 s time window to distinguish parents' temporally contingent from non-temporally contingent responses (e.g., Baumwell et al, 1997;Benassi et al, 2018;Goldstein & Schwade, 2008;Miller & Lossia, 2013;Shimpi et al, 2012;Tamis-LeMonda et al, 2001).…”