“…Consequently, the likelihood of children's using (e.g., Brooks, Tomasello, Dodson, and Lewis, 1999), accepting (Ambridge, Pine, Rowland, and Young, 2008;Ambridge, Pine, Rowland, Jones, and Clark, 2009;, and comprehending (Dittmar, Abbot-Smith, Lieven, and Tomasello, 2013) verbs in non-attested constructions decreases with increasing verb frequency. 10 With regard to semantics, children learn the fine-grained semantic properties of particular construction slots (e.g., that the [Z] slot in the [X] [Y][Z] construction denotes direct causation), meaning that verbs that are not compatible with this meaning (e.g., giggle) are a better fit for slots in other, competing constructions such as the intransitive and periphrastic causative (Ambridge, Pine, Rowland, Jones, and Clark, 2009;Ambridge, Pine, Rowland, and Chang, 2012;Ambridge, Pine, Rowland, Freudenthal, and Chang, 2014;Ambridge, Pine, and Rowland, 2011).…”