Maternal sensitivity predicts language gain in preschool children who are deaf and hard of hearing.

The link between maternal sensitivity and child language gain was assessed in a prospective study of hearing mothers and their deaf and hard-of-hearing (D/HH) children. Maternal sensitivity in dyadic interaction was assessed when children were approximately 2 years old, and expressive language gain was assessed at 2 to 3 years using the Minnesota Child Development Inventory. Sensitivity made significant, positive, and unique predictions of expressive language gain when the effects of maternal education, degree of child hearing loss, dyadic mode of communication, and time between assessments were controlled. Findings indicate the value of affective measures of interaction in predicting language gain.

Toddlers' acquisition of self/other knowledge: ecological and interpersonal aspects of self and other.

The complexity of toddlers' self-development was examined in the context of knowing others. Two studies were designed to test whether toddlers' self-knowledge was different from their knowledge of others (e.g., mother and inanimate object) or whether toddlers' knowledge of persons (e.g., self and mother) was different from their knowledge of objects. Knowledge of self, mother, and inanimate object was observed in developmentally sequenced tasks assessing agency and featural knowledge. When the inanimate object was perceptually different from humans, 12-month-old toddlers responded differently to all 3 versions. When the inanimate object was perceptually similar to humans, 24-month-olds distinguished self from other and did not distinguish between the 2 versions of "other:" mother and inanimate object. We concluded that 12-month-old infants were more sensitive to perceptual features of objects than were older toddlers. Data were interpreted according to Neisser's distinction between the ecological self and the interpersonal self.

Dyssynchrony, conflict, and resolution: positive contributions to infant development.

While most psychological research has emphasized the importance of conflict-free mother-infant interactions, a review of recent research suggests that dyssynchrony, conflict, and their successful resolution are also integral to normative mother-infant interactions and optimal infant outcomes. Theory and research incorporating these concepts are described, areas for research suggested, and clinical applications noted.