“…Finally, future research would benefit from considering additional factors affecting grammatical development such as complexity of form (Gathercole, Sebastian, & Soto, 1999), iconicity (Cho et al, 2002;Slobin, 2001), salience, relevance, form-function transparency (Slobin, 2001) and cue locality (Kail, 1989;Slobin, 1982). The aim of the current study was not, therefore, to argue that the frequency of exposure to linguistic material is the 'be all and end all' of language acquisition but rather that it plays a central role in structuring language and can shed much light on its developmental trajectory.…”