The control of instrumental action following outcome devaluation in young children aged between 1 and 4 years.

To determine the role of action-outcome learning in the control of young children's instrumental behavior, the authors trained 18- to 48-month-olds to manipulate visual icons on a touch-sensitive display to obtain different types of video clips as outcomes. Subsequently, one of the outcomes was devalued by repeated exposure, and children's propensity to perform the trained actions was tested in extinction. On test, children with a mean age greater than 2.5 years performed the action trained with the devalued outcome less than those trained with the still-valued outcome, thereby demonstrating that their actions were mediated by action-outcome learning. By contrast, the instrumental responses of younger children (mean age     

What limits children's working memory span? Theoretical accounts and applications for scholastic development.

Explanations of working memory span in children were studied in a longitudinal follow-up of J. N. Towse, G. J. Hitch, and U. Hutton (1998). Reading span and operation span were lower when within-task retention intervals were lengthened. For each task, variation in span between test waves and age cohorts was systematically related to changes in processing speed. The two spans explained substantial shared variance in both reading and arithmetic scores, with some evidence for domain specificity. Combined span scores predicted unique variance in scholastic attainment over a 1-year interval. The authors concluded that working memory span is constrained by rapid loss of active codes and is not simply a measure of capacity for resource sharing. Working memory is also implicated in scholastic development. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Earthquakes and children: The role of psychologists with families and communities.

The 2008 Sichuan Province earthquake and 2005 Pakistan earthquake are examples of natural disasters that took an unimaginable toll on children. In such disaster management contexts, family members as well as health care and school personnel are the first-line responders and are natural sources of continued social support as children recover. Although psychologists have increasingly sophisticated understandings of post-disaster reactions and strategies for helping children and adolescents cope with trauma, models for responding to mass catastrophes are limited, particularly in geographically remote communities and in regions in which mental health services are stigmatizing. With children’s well-being subsequent to earthquakes inextricably linked to family and community, psychologists can make important contributions in 3 spheres: (a) coordinating and activating collaborations within children’s existing social contexts to develop post-earthquake interventions; (b) designing prevention and preparedness programs focused on the emotional needs of children in earthquake-prone communities; and (c) conducting research on interventions and recovery with particular attention to developmental stage, sociocultural-economic contexts, and the similarities versus differences across various types of disasters. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Cardiovascular reactivity during social and nonsocial stressors: Do children's personal goals and expressive skills matter?

The relationships between social competence and cardiovascular reactivity were evaluated in 180 children (ages 8-17; 52% female; 53% Caucasian). Participants performed a social task (Social Competence Interview [SCI]) and 2 nonsocial tasks while reactivity measures were obtained. Social competence was coded from SCI audiotapes. Among adolescents, higher scores on the Acceptance-Affiliation subscale were associated with increased heart rate (HR) and blood pressures and with decreased HR variability during the SCI. Among boys, greater Acceptance-Affiliation scores were associated with increased vascular reactivity during the SCI. During the nonsocial tasks, higher Self-Defensiveness and Expressiveness scores were associated with increased cardiac output and stroke volume among African American children. Personal strivings and expressive skills do matter for understanding cardiovascular responses in children. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Contextual amplification of pubertal transition effects on deviant peer affiliation and externalizing behavior among African American children.

The effects of the pubertal transition on behavior problems and its interaction with family and neighborhood circumstances were examined with a sample of 867 African American children 10-12 years of age. Pubertal development status, pubertal timing, and primary caregivers' parenting behaviors were significantly related to affiliation with deviant peers and externalizing behaviors. Externalizing behavior among early-maturing children was associated positively with primary caregivers' use of harsh-inconsistent discipline and negatively with nurturant-involved parenting practices. Disadvantaged neighborhood conditions were significantly associated with deviant peer affiliation. The effect of pubertal transition varied according to family and neighborhood conditions: Early-maturing children living in disadvantaged neighborhoods were significantly more likely to affiliate with deviant peers. Early-maturing children with harsh and inconsistent parents were significantly more likely to have externalizing problems. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Object constancy: The illusion of being seen.

Recent theoretical advances in the concept of object constancy have placed it in the context of the child's establishing a separate identity. Although these advances were partly the result of examining the child's growing abilities to evoke a mental image of the absent mother, constancy cannot be well understood as a type of mental representation. It more resembles an illusion, specifically the illusion that the mother is constantly available in her mirroring function. The child's sense of his or her own reality is born in the mother's affectively attuned mirroring, as nothing about the child is real for the child until first seen by the mother. The illusion of the constant object allows the child to construct a sense of his or her own separate reality. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Deviant of diverse peer groups? The peer affiliations of aggressive elementary students.

This study examined peer affiliations of aggressive children in a sample of 948 students (496 girls, 452 boys) from 59 elementary classrooms (4th-6th grades). Groups were identified as zero aggressive, nonaggressive, aggressive, and mixed. The deviant peer group hypothesis was partially supported. Two thirds of aggressive boys and one half of aggressive girls were members of nonaggressive or mixed peer groups. Unpopular aggressive boys were most likely to be members of nonaggressive groups, whereas popular aggressive boys were most likely to be in aggressive and mixed groups. Aggressive and nonaggressive associates tended to he similar on key social characteristics (i.e., popularity, athleticism, leadership). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Children's interpretation of generic noun phrases.

Generic utterances (e.g., "Cows say 'moo"') have 2 distinctive semantic properties: (a) Generics are generally true, unlike indefinites (e.g., "Bears live in caves" is generic; "I saw some bears in the cave" is indefinite), and (b) generics need not be true of all category members, unlike universal quantifiers (e.g., all, every, each). This article examined whether preschool children and adults appreciate both these features, using a comprehension task (Study 1) and an elicited production task (Study 2). In both tasks, 4-year-old children--like adults--treated generics as distinct from both indefinites ("some") and universal quantifiers ("all"). In contrast, 3-year-olds did not differentiate among generics, "all," and "some." By 4 years of age, generics emerge as a distinct semantic device. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Between the laboratory and life: Child development research in Toronto, 1919-1956.

Between 1919 and 1956, psychologists at the University of Toronto built a research program in developmental psychology on a functionalist, holistic, and ecological basis. They conducted longitudinal studies on mental health in growing children in educational settings instead of in laboratories and formed strong alliances with the local educational system in order to do so. They initially defined mental health as adjustment and considered conditions within schools to be conducive to its attainment. After developing a psychological theory of personality development, they came to view educational conditions as discouraging the development of mental health. The alliance between the educational system and psychology consequently unraveled, and the program declined. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Children's understanding of the knowledge prerequisites of drawing and pretending.

Many young children will claim that someone is pretending to be something even when the person does not know what that something is. To examine whether children's failure to take knowledge prerequisites into account is part of a more fundamental problem in recognizing how mental representations constrain external ones, the authors asked children whether an artist who did not know what something was, yet whose drawing bore resemblance to it, was drawing it. The same questions were asked regarding pretending. Children performed similarly on pretending and drawing questions, and performance on both questions improved when the protagonists' point of view was emphasized. Performance for drawing improved somewhat when alternative goals were stated. Further, cross-sectional data indicated that understanding how knowledge relates to producing external representations increases gradually from age 4 to age 8, suggesting that experiential factors may be crucial to this understanding. (PsycINFO Database Record (c) 2010 APA, all rights reserved)