From a dynamic systems perspective, transition points in development are times of increased instability, during which behavioral patterns are susceptible to temporary decoupling. This study investigated the impact of the vocabulary spurt on existing patterns of communicative coordination. Eighteen typically developing infants were videotaped at…

Aim: Prader-Willi syndrome (PWS) is a genetic disorder historically characterized by two phenotypic stages. The early phenotype in infants is associated with hypotonia, poor suck, and failure to thrive. In later childhood, PWS is associated with intellectual disability, hyperphagia, as well as growth and sex hormone deficiency. Little is known…

Three experiments tested whether 12- to 24-month-old children showed systematic search, persistence, and/or end-screen search in the invisible-displacement task. A fourth study tested whether end-screen search resulted from seeing the experimenter move his hand through the series of screens. (RH)

Aggressive behaviors in children and adolescents have undergone important conceptual and definitional modifications in the past two decades. In particular, subtypes of aggression have been proposed that separate the form and the function of the aggressive behaviors (i.e., social vs. physical aggression; reactive vs. proactive aggression).…

Parental care plays an important role in the emotional and cognitive development of the offspring. Children who have been exposed to abuse or neglect are more likely to develop numerous psychopathologies, while good parent-infant bonding is associated with improved resiliency to stress. Similar observations have also been reported in non-human…

The data indicate that fathers do interact with their infants, and that they demonstrate charactersitic styles of interaction. (Author)

Presents a developmental study of changes in infant attachment behaviors. Five groups of female infants, 8, 11, 14, 19, and 24 months of age, were observed during varying types of separation experiences. Changes in proximity behaviors and contact behaviors were analyzed. (BD)

Observed infants' responses in a food-requested procedure to explore their understanding of other people's desires. Found that only the 18-month-olds were able to engage in some form of desire reasoning. Children not only inferred that another person held a desire, but also recognized how desires were related to emotions and understood something…

A study tracked the developmental and behavioral recovery of infants and preschool children (N=12) who had suffered brain injuries. Significant developmental recovery and behavioral progress occurred during the first 3.5 to 4 months following insult. However, self-stimulatory and atypical rhythmic habit patterns increased as the children passed…

This paper examines the interrelationship between children's acquisition and use of symbols and the development of imaginative play. The paper focuses on the use of pretend play as an expression of the child's capacity for symbolic functioning and as an index of intellectual development. The first section of the paper reviews developmental changes…

Notes that many researchers have asserted maternal "sensitivity" as the key feature of interactions promoting "secure" attachment relationships. Reviews literature addressing the construct of sensitivity, highlighting the problem of definition and identifying the range of behaviors typically used as indicators of sensitivity.…

Presents an integrated clinical approach, based on a developmental, structuralist framework, to classify adaptive and pathological personality organizations and behaviors in infants and preschool children. (Author/DB)