“…Further, the results of some observational studies are consistent with the view that mothers (and other adults) adapt their verbal and gestural communication in a manner that would facilitate lexical learning in infants. For example, when adults named objects and actions on which infants were focused, rather than those outside their focus, infants learned words rapidly (Akhtar, Dunham, & Dunham, 1991;Olsen-Fulero, 1982;Tamis-Lemonda & Bornstein, 1989). However, other studies have reported that mothers often name objects and actions outside infants' immediate attentional focus (Collis, 1977;Harris, Jones, & Grant, 1983).…”