“…Structures that support language use develop through statistical learning over the input to the child, constrained by the state of the child's developing perceptual, motor, and memory systems (Seidenberg, 1997). There is a robust empirical enterprise devoted to identifying the properties of statistical learning, such as the kinds of units it operates over (Gerken, Wilson, & Lewis, 2005;Willits, Seidenberg, & Saffran, 2014), whether learning occurs over nonadjacent elements (Newport & Aslin, 2004), whether it occurs over different types of structures simultaneously (Sahni, Seidenberg, & Saffran, 2010) and so on. In a parallel development, studies of adult performance now focus on the use of language statistics in online processing (MacDonald & Seidenberg, 2006), facilitated by the availability of large language corpora.…”