TABLE 1.

Description of behavioral codes used to characterize maternal sensory input to her child.

Sensory category	Behaviors	Description
Auditive	Maternal vocalizations	Mother makes a vocalization (“There is a ball. The ball is red.” There are two distinct vocalizations)
Tactile	Maternal touch	Touching, stroking
	Maternal holding	Holding the child
Visual	Mother manipulating objects	Mother is holding a toy or other object
	Child visually attending to maternal activities	Child is looking at a toy mother is manipulating