“…By some accounts, an overuse of directives as a scaffold may slow children's progress toward independence (Diaz et al, 1991), as they restrict the zone of proximal development. Some researchers have indicated that parents of children with language problems overuse directives and thus do not adequately support their children's movement toward independent knowledge and acquisitions within the zone of proximal development (e.g., Pellegrini, Brody, & Sigel, 1985;Poikkeus, Ahonen, Närhi, Lyytinen, & Rasku-Puttonen, 1999). The greater directiveness of mothers of children with language problems, as seen in some studies, has been interpreted as showing that the quality of maternal scaffolding inadequately compensates for their children's language weaknesses.…”