Data were examined to determine (1) the stability of negative emotional characteristics from early life through adolescence; (2) the degree of relation between these emotional characteristics and adjustment in childhood and adolescence; and (3) the degree to which the characteristics differentially predict multiple adjustment dimensions in…

Developmental changes in conditions engendering pride and embarrassment were explored. Among other results, developmental change was found in the standards used to evaluate emotional experiences; references to social comparison increased with age and references to mastery decreased. (PCB)

Young children's understanding of the effects of ambiguous and informative messages on a listener's knowledge is studied in two experiments. (PCB)

A sharp improvement in children's understanding of the role of visual perception and linguistic communication in knowledge functions was found between the ages of three and five years. (PCB)

In three experiments, children five- to 10-years-old were assessed on their comprehension of simple and compound comparatives using a picture-question answering task. Ability to use appropriate reference points increased with age on both the simple and compound comparative relations. (PCB)

Two strategies that children use to figure out new word meanings--attention to linguistic form class and the assumption of lexical contrast--were examined. It was found that very young children use both form class and lexical contrast to interpret new words. (PCB)

Preschoolers were assigned to experimental and control groups to investigate whether they could learn novel words when viewing television and whether the learning was influenced by age or type of word. (PCB)

Monolingual children were assigned to two groups to examine the role of reinforcement in language acquisition. One group was differentially reinforced for use of foreign vocabulary. The other group was first reinforced nondifferentially for use of either native or foreign language and later differentially reinforced for foreign language use. (PCB)

A comparison of vocal development in deaf and hearing infants indicates that well-formed syllable production is established in the first 10 months of life by hearing infants but not by deaf infants, suggesting that audition plays an important role in vocal development. (PCB)

Two studies are presented that document the spontaneous development by normal infants of nonverbal gestures to symbolically represent objects, needs, states, and qualities. These gestures are shown to be a typical phenomenon of early development and to function in ways similar to early verbal symbols. (PCB)

Findings indicate that infants can detect regularity in spatiotemporal series; will develop expectancies for events in the series; and will act on the basis of those expectancies even when their actions have no effect on the stimulus events. (PCB)

Six experiments were conducted to investigate the sensitivity of one- to four-year-olds to changes in perspective that are occluded from view. Results indicated relatively early sensitivity to proprioceptive cues for changes in perspective and somewhat later sensitivity to appropriate visual-environmental cues. (PCB)

The relation between cry acoustics and vagal tone in normal, healthy newborns undergoing an acutely stressful event was examined. Vagal tone was significantly reduced during the stressful event and was paralleled by significant increases in the pitch of the infants' cries. (PCB)

This study assessed the extent to which infants use fathers as referencing targets and the familial context that might mediate referencing to both parents. Infants used fathers and mothers as referencing targets to an equal extent. Marital satisfaction was found to be a significant modifier of referencing. (PCB)

Multiple discriminant function analysis was conducted with data from Strange Situations. Results enable researchers to obtain attachment classifications directly from scores on interactive behavior and crying during reunion episodes. (PCB)