Social interaction,social observation,and cognitive development in young children

Eighty first-grade childen were pretested on a variety of conservation tasks. Subjects who were either nonconservers or intermediate conservers were randomly assigned to one of three conditions: social interaction, social observation, and individual control. Subjects in the social interaction condition worked collaboratively on conservation tasks with a same sex partner. Subjects in the social observation condition individually observed pairs of subjects working together and control subjects worked individually on conservation tasks. The purpose of the social observation condition was to control for the effects of task relevant information that was expressed during dyadic interactions. All subjects were individually post-tested on conservation tasks that were the same form but different content than the pretest items. Subjects in the social interaction condition had significantly greater cogntive change scores (post-test less pretest) than subjects in the social observation and control conditions. There were no significant differences between change scores of subjects in the latter two conditions. Also, subjects in the social interaction condition gave significantly more novel explanations for conservation judgments than subjects in the social observation condition. These findings supported a socio-cognitive conflict model of cognitive development in young children.     

Effects of explaining on children's preference for simpler hypotheses

Research suggests that the process of explaining influences causal reasoning by prompting learners to favor hypotheses that offer “good” explanations. One feature of a good explanation is its simplicity. Here, we investigate whether prompting children to generate explanations for observed effects increases the extent to which they favor causal hypotheses that offer simpler explanations, and whether this changes over the course of development. Children aged 4, 5, and 6 years observed several outcomes that could be explained by appeal to a common cause (the simple hypothesis) or two independent causes (the complex hypothesis). We varied whether children were prompted to explain each observation or, in a control condition, to report it. Children were then asked to make additional inferences for which the competing hypotheses generated different predictions. The results revealed developmental differences in the extent to which children favored simpler hypotheses as a basis for further inference in this task: 4-year-olds did not favor the simpler hypothesis in either condition; 5-year-olds favored the simpler hypothesis only when prompted to explain; and 6-year-olds favored the simpler hypothesis whether or not they explained.     

Age at Adoption from Institutional Care as a Window into the Lasting Effects of Early Experiences

One of the major questions of human development is how early experience impacts the course of development years later. Children adopted from institutional care experience varying levels of deprivation in their early life followed by qualitatively better care in an adoptive home, providing a unique opportunity to study the lasting effects of early deprivation and its timing. The effects of age at adoption from institutional care are discussed for multiple domains of social and behavioral development within the context of several prominent developmental hypotheses about the effects of early deprivation (cumulative effects, experience-expectant developmental programming, and experience-adaptive developmental programming). Age at adoption effects are detected in a majority of studies, particularly when children experienced global deprivation and were assessed in adolescence. For most outcomes, institutionalization beyond a certain age is associated with a step-like increase in risk for lasting social and behavioral problems, with the step occurring at an earlier age for children who experienced more severe levels of deprivation. Findings are discussed in terms of their concordance and discordance with our current hypotheses, and speculative explanations for the findings are offered.     

Age, gender, and interpersonal behavior development using the FIRO-BC

It has been argued that many human behaviors follow predictable developmental patterns, or stages. The FIRO-BC was given to 9- through 13-year-old children (n = 282) to test for a stage-like progression in interpersonal behavior development. The data presented here failed to evidence an age-related progression. However, gender differences did appear in 11-year-olds and increased dramatically by age 13. Geographical differences were found in that the present data differed significantly from the normative data presented in the FIRO manual. The data also support the notion that, at least within the southern population tested. interpersonal behavior may be more related to puberty than has been previously supposed.     

Effects of varying post-KR intervals upon children' motor performance

An experiment using post-KR interval methodology was designed to investigate the developmental relationship of age and processing speed regarding performance on a ballistic linear slide task. The hypothesis drawn from the developmental literature was that, given a short time for processing information, younger children should perform less efficiently than older children and adults. However, an increase in processing time should result in performances being more similar. Subjects in the experiment were 90 female children equally divided among 7 and 11-yr-olds and adults. Within age, subjects were randomly assigned to one of three post-KR interval groups: 3, 6, and 12 sec. Conclusions support the processing deficits hypotheses of Chi (1976): given enough time to process KR, the children's performance was not significantly different from the performance of adults.     

Children's explanations of the intentions underlying others' behaviour

This study investigated developmental differences in children's explanations of the intentions underlying the behaviours of others, including behaviours that conflicted with their expectations. Children aged 6–13 and adults explained the intentions underlying their predictions of behaviour following stories with ambiguous, positive, and negative cues. Children were then presented with experimenter–provided conflicting behaviour and explained again. Results indicated that with no clear cues, children and adults had optimistic expectations. When cues were provided, participants across development provided explanations consistent with positive cues, but children under age 10 were reluctant to provide explanations consistent with negative cues, despite good recall. When explaining conflicting behaviour, people may hesitate to overlook suspicions of negative intent sometimes even in the face of good behaviour, and this reluctance may increase with age. Findings suggest we may all overcome an optimistic bias, but children under age 10 may struggle more to do so.     

The verbal nature of representations of the canonical colors of objects

In selecting the canonical colors of color-specific objects, children may use verbal mediation, a cognitive process whereby an object and its color are matched using verbal rather than pictorial representation [British Journal of Developmental Psychology 14 (1996) 339]. To investigate this process, 108 2- to 5-year-old children were asked to identify 11 colors and to choose crayons to color pictures of color-specific objects. Canonical color choice was significantly predicted by color-labeling skill above the variance portion predicted by age alone. Children were also asked to explain their color choices. Children who knew their colors and who colored canonically provided explanations for their color choices consistent with verbal mediation. However, a high proportion of children who did not know a color, and thus could not use verbal mediation, also gave sophisticated explanations for their color choices if they colored the objects canonically. These findings provide modest support for the idea that identification of canonical colors of objects is a verbal process.     

The effect of experience on children's ability to show response and place learning

From a developmental perspective, it has been reasoned that over the course of development children make differential use of available landmarks in the surroundings to orient in space. The present study examined whether children can learn to apply different spatial strategies, focusing on different landmark cues. Children aged 7 and 10 years were tested on an object‐location memory task in which they learned a location relative to a direct cue or to indirect cues. Both age groups performed equally well on the direct test condition. However, children 7 years of age had difficulties with orienting relative to the indirect landmarks. Interestingly, their performance increased significantly with more relevant experience. Different explanations for these findings are discussed.     

3~6岁儿童二级错误信念认知的发展

采用“新故事”对来自两所幼儿园的133名3~6岁儿童的二级错误信念进行了测查,探查了这一阶段儿童二级错误信念认知的发展。研究主要得出以下结论：4岁左右的儿童能够掌握二级未知知识,但是儿童对于二级错误信念的理解要晚1~2年,6岁左右是儿童二级错误信念发展的关键期。儿童对于信念问题的错误回答主要是基于一级推理,相当一部分的6岁儿童能够基于二级推理对信念问题做出合理解释。儿童对于二级错误信念认知的发展不是一个全或无的过程,而是一个逐步发展的过程。     

Resilient Children: Individual Differences in Developmental Outcome of Children Born to Drug Abusers

Since 1977, we have been following the neurobehavioral development of two groups of children: a group born to women on methadone maintenance and a drug-free comparison group. This study used the data on the children evaluated at 36 months of age to determine whether distinct patterns of developmental outcome can be identified, and which medical, familial, or environmental characteristics are associated with developmental differences. The children were clustered on four measures at 36 months: head circumference percentile, Merrill-Palmer Scale score, neurological evaluation, and referrals for developmental problems. Three distinct clusters emerged, with methadone children disproportionately frequent in Cluster 3, the group showing the poorest development. Comparisons of the clusters on a wide range of variables revealed consistent differences between Cluster 1 and Cluster 3 children in maternal responsiveness and incidence of neglect and family violence. These findings indicate that distinct developmental patterns do occur within this predominantly lower-class ghetto population; further, that children born to methadone-maintained women are more likely to show poor development. However, when the environment provides nurturance and stability, methadone children can show resilience and develop well.     

Resilient children: individual differences in developmental outcome of children born to drug abusers.

Since 1977, we have been following the neurobehavioral development of two groups of children: a group born to women on methadone maintenance and a drug-free comparison group. This study used the data on the children evaluated at 36 months of age to determine whether distinct patterns of developmental outcome can be identified, and which medical, familial, or environmental characteristics are associated with developmental differences. The children were clustered on four measures at 36 months: head circumference percentile, Merrill-Palmer Scale score, neurological evaluation, and referrals for developmental problems. Three distinct clusters emerged, with methadone children disproportionately frequent in Cluster 3, the group showing the poorest development. Comparisons of the clusters on a wide range of variables revealed consistent differences between Cluster 1 and Cluster 3 children in maternal responsiveness and incidence of neglect and family violence. These findings indicate that distinct developmental patterns do occur within this predominantly lower-class ghetto population; further, that children born to methadone-maintained women are more likely to show poor development. However, when the environment provides nurturance and stability, methadone children can show resilience and develop well.     

Welfare policies and very young children: experimental data on stage-environment fit

The authors examined the effects of welfare programs that increased maternal employment and family income on the development of very young children using data from 5 random-assignment experiments. The children were 6 months to 3 years old when their mothers entered the programs; cognitive and behavioral outcomes were measured 2-5 years later. While there were no overall program impacts, positive or negative, on the development of children in this age group, there was a pair of domain- and age-specific effects: The programs decreased positive social behavior among 1-year-olds and increased school achievement among 2-year-olds. After exploring several explanations for these results, the authors suggest that the contextual changes engendered by the programs, including children's exposure to center-based child care, interacted differentially with specific developmental transitions.     

Differential emergence of representational systems: Drawings,letters, and numerals

This study investigated the process by which the representational activity and knowledge about drawing and letter and number writing emerge in children 21–46 months old. The results revealed that representational activities developed with age through several phases. Beginning at age 2, children produced different marks for different systems, but children under two produced common graphic marks. Representational systems were significantly correlated with developmental processes, but drawing developed faster than letters or numbers with respect to both their production and their classification. Three-year-old children were able to recognize each system correctly in a sample-matching task, but the recognition of each system was not correlated with representational activity. These findings indicate that only after children engaged in graphic production did they begin to make representational distinctions among systems by drawing on their domain-specific knowledge, although alternative explanations can be suggested.     

Children’s success at detecting circular explanations and their interest in future learning

These studies explore elementary-school-aged children’s ability to evaluate circular explanations and whether they respond to receiving weak explanations by expressing interest in additional learning. In the first study, 6-, 8-, and 10-year-olds (n = 53) heard why questions about unfamiliar animals. For each question, they rated the quality of single explanations and later selected the best explanation between pairs of circular and noncircular explanations. When judging single explanations, 8- and 10-year-olds, and to some extent 6-year-olds, provided higher ratings for noncircular explanations compared to circular ones. When selecting between pairs of explanations, all age groups preferred noncircular explanations to circular ones, but older children did so more consistently than 6-year-olds. Children who recognized the weakness of the single circular explanations were more interested in receiving additional information about the question topics. In Study 2, all three age groups (n = 87) provided higher ratings for noncircular explanations compared to circular ones when listening to responses to how questions, but older children showed a greater distinction in their ratings than 6-year-olds. Moreover, the link between recognizing circular explanations as weak and interest in future learning could not be accounted for solely by individual differences in verbal intelligence. These findings illustrate the developmental trajectory of explanation evaluation and support that recognition of weak explanations is linked to interest in future learning across the elementary years. Implications for education are discussed.     

The Development of Judgment and Decision Making During Childhood and Adolescence

Research on adult judgment and decision making has focused on deviations from normative models, demonstrating biases and reliance on heuristic shortcuts, thus presenting a very different picture than developmental theories that describe a unidirectional progression toward greater logic and efficiency. Recent research related to this apparent contradiction indicates that children develop competencies to reason effectively and make normative decisions, but also develop biased judgment strategies that are used inappropriately in some situations. We suggest potential explanations for the findings, highlighting the need to consider models that incorporate development in both experiential and analytic information processing systems.     

Developmental trends in children’s typicality judgments

Category typicality norms from 12 natural language categories are presented for kindergarten, third-grade, sixth-grade, and college students. Subjects first selected examples of familiar word concepts and rated them on a 3-point scale in terms of category typicality. Age differences in the percentage of items included as category members were found primarily for the less typical items, with inclusion rates varying as a function of both age and typicality level. The absolute level of typicality judgments increased with age, although correlations between the children’s and college students’ ratings were generally significant for all three children’s groups, with average correlations increasing somewhat with age. It was suggested that the rating data would be useful to developmental investigators interested in children’s processing of category information.     

Midline crossing: developmental trend from 3 to 10 years of age in a preferential card-reaching task

We assessed 110 left-handed and 322 right-handed children aged from 3 to 10 years, using Bishop's card-reaching task. Manual body midline crossings were observed. A regular developmental trend was observed from 3 to 10 years: older children crossed the body midline more frequently when reaching for cards than did younger children. The factor age explained 4.9% of the variance. Significant differences appeared between 3-4 years old children and 8-10 years old children. The effect of the spatial position of the cards was also significant: the contralateral hand was used less often to reach cards at the most extreme positions. These findings in this task demonstrate that the development of the degree of handedness follows a long developmental trend.     

Maternal Style and Children's Participation in Reminiscing: Stepping Stones in Children's Autobiographical Memory Development

In this study we investigated maternal and child factors in children's autobiographical memory development. Fifty-eight mother-child dyads discussed unique past events when the children were 19, 25, 32, and 40 months old. In addition, children participated in experimenter-child interviews about unique events when they were 25, 32, and 40 months old. The developmental progression to children's independent verbal memory begins with children's early interest in participating in the conversations and maternal reminiscing style, which together elicit children's later shared memory elaborations. Subsequently, children's shared memory elaborations and maternal reminiscing style both contribute to children's later independent memory at approximately 3 1/2 years of age. We address the idea that autobiographical memory development is essentially a collaborative process, with children significantly contributing to the development of their own reminiscing style from its inception.     

Differential patterns of preference for modified linear perspective in children and adults

Two experiments were designed to investigate the development of a preference for minimal convergence in pictures. Pictures varying in degree of convergence from conic to parallel were observed three at a time under two conditions: monocularly at the correct station point for the conic projection, and freely with unconstrained view. Subjects were children in nursery school (age: 4 years) and first grade (age: 6 years), and adults in college. Subjects were asked to choose the “best” picture. In the correct station point condition the younger children preferred the most conic picture, while adults chose the most parallel projection significantly more frequently than either remaining choice. First-grade children were in transition between these two modes of responding. In the free view condition, the younger children showed no strong preferences, while older children and adults preferred parallel projections significantly more frequently than more convergent pictures. Results were interpreted in context of the development of the “Zoom effect,” an assumption of appropriate viewing distance 10 times as great as the size of the pictured object.