“…First, they focused only on maternal input and/or interaction styles (Chan et al, 2009;Choi, 2000;Melzi & Caspe, 2005), without examining children's talk. Second, these studies have focused only on limited aspects of mother-child interactions during joint book reading, such as the usage of nouns and verbs (Chan et al, 2009;Choi, 2000;Ogura et al, 2006;Tardif, 1996;Tardif et al, 1997Tardif et al, , 1999 and the maternal utterances preceding or following child-produced labels (Murase et al, 2005). Other potentially revealing aspects of joint book reading, such as the purposes and the content of mothers' and children's talk, were not examined.…”