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Körperliche Attraktivität und gutes Aussehen spielen in der heutigen Gesellschaft eine entscheidende Rolle, was bereits frühzeitig auch Kinder und Jugendliche in ihren Einstellungen und der Wahrnehmung ihres Körpers prägt. Sorgen um den eigenen Körper gelten als normatives Problem unter Jugendlichen und bergen nicht selten das Risiko für gesundheitsgefährdendes Verhalten und psychische Erkrankungen. In der Suche nach den Ursachen gerieten in den letzten Jahren insbesondere soziokulturelle Faktoren, insbesondere der Einfluss von medial vermittelten Schönheitsidealen, in den Fokus der Forschung. Es ist jedoch fraglich, warum nicht alle Jugendlichen in gleicher Weise auf den allgegenwärtigen Mediendruck reagieren. Naheliegend ist, dass die Jugendlichen besonders gefährdet sind, deren unmittelbares soziales Umfeld das geltende Schönheitsideal direkt oder indirekt vermittelt und verstärkt. Das Verständnis der Rolle sozialen Drucks ist jedoch bislang noch durch zahlreiche inhaltliche und methodische Aspekte beschränkt (z.B. Einschränkungen in der Operationalisierung, ungenügende Berücksichtigung geschlechtsspezifischer Mechanismen, fehlende längsschnittliche Belege). Daher widmet sich die vorliegende Arbeit der Bedeutung aussehensbezogenen sozialen Drucks in der Entstehung von Körperunzufriedenheit im Jugendalter in drei aufeinander aufbauenden Untersuchungsschritten. Ausgehend von der Entwicklung eines umfassenden und zuverlässigen Erhebungsinstruments zielt die Arbeit darauf ab, unterschiedliche Aspekte sozialen Drucks gegenüberzustellen und hinsichtlich ihrer Verbreitung und Risikowirkung zu vergleichen. Die Umsetzung des Forschungsvorhabens erfolgte in unterschiedlichen Schülerstichproben der Klassen 7 bis 9 unterschiedlicher Gymnasien und Gesamtschulen (Hauptstichprobe N = 1112, im Mittel = 13.4 ± 0.8 Jahre). Dabei wurden sowohl quer- als auch längsschnittliche Analysen durchgeführt. Zusätzlich wurden zur Erprobung des Fragebogenverfahrens klinische Stichproben mit Ess- und Gewichtsstörungen herangezogen. Zur detaillierten Erfassung unterschiedlicher Formen aussehensbezogenen sozialen Drucks erfolgte im ersten Schritt die Entwicklung des Fragebogen zum aussehensbezogen sozialen Druck (FASD), welcher acht unterschiedliche Formen aussehensbezogene sozialen Drucks ausgehend von Eltern und Gleichaltrigen reliabel und valide erfasst. Dabei erwies sich das Verfahren gleichermaßen für Jungen und Mädchen, wie für Jugendliche mit unterschiedlichem Gewichtsstatus geeignet. Die psychometrische Güte des Verfahrens konnte sowohl für populationsbasierte als auch für klinische Stichproben mit Ess- und Gewichtsstörung belegt werden, wodurch eine breite Einsatzmöglichkeit in Forschung und Praxis denkbar ist. Im zweiten Schritt erfolgte die Untersuchung der Verbreitung aussehensbezogenen sozialen Drucks unter besonderer Berücksichtigung von Geschlechts-, Alters- und Gewichtsgruppenunterschieden. Dabei erwiesen sich Mädchen als stärker von aussehensbezogenem Druck durch Gleichaltrige betroffen als Jungen. Darüberhinaus legen die Ergebnisse nahe, dass Übergewicht ungeachtet des Geschlechts mit verstärkten aussehensbezogenen Abwertungen und Ausgrenzungserfahrungen verbunden ist. Zudem deuten die Alterseffekte der Studie darauf hin, dass der Übergang von früher zu mittlerer Adoleszenz aber auch Schulwechsel besonderes kritische Zeitpunkte für die Etablierung aussehensbezogener Einflüsse darstellen. Abschließend widmete sich die Arbeit der längsschnittlichen Risikowirkung unterschiedlicher Aspekte aussehensbezogenen sozialen Drucks in der Entstehung von Körperunzufriedenheit. Aussehensbezogene Einflüsse von Freunden verstärkten längsschnittlich Körpersorgen sowohl bei Mädchen als auch bei Jungen. Zudem ergab sich das Erleben von Ausgrenzung durch Gleichaltrige als entscheidender Risikofaktor für gewichtsbezogene Körpersorgen unter Jungen. Als bedeutsamster elterlicher Einfluss erwiesen sich Aufforderungen auf die Figur zu achten. Diese Aufforderungen verstärkten gleichermaßen für Mädchen und Jungen gewichtsbezogene Körpersorgen. Die vorliegende Arbeit widmete sich dem Ziel, die Rolle aussehensbezogener sozialer Einflüsse weiter aufzuklären. Das dazu vorgelegte umfassende Instrument ermöglichte eine differenzierte Betrachtung der Verbreitung und Wirkung unterschiedlicher Formen sozialen Drucks. Hierdurch weisen die Ergebnisse nicht nur auf wichtige geschlechtsspezifische Mechanismen hin, sondern leisten ebenso einen Beitrag zum vertieften Verständnis der Risikowirkung sozialen Drucks. Diese Erkenntnisse liefern somit einerseits konkrete Ansatzpunkte für Prävention und Intervention und ermöglichen andererseits auch eine weitere Konkretisierung bereits etablierter soziokultureller Wirkmodelle. / Physical appearance and attractiveness play a major role in today’s society, which affects also children and adolescents in their attitudes and the perception of their bodys. Body concerns, which have become normative among adolescents, however, bear the risk of health-endangering behavior as well as severe mental diseases. While investigating the reasons for this development, sociocultural pressures especially media promoted beauty ideals got into the focus of research. But the findings provoke the question why the media ideal does not affect all adolescents to the same extent. However, it seems likely that those adolescents who grow up in an appearance-focused social environment are particularly at risk of developing body concerns. The knowledge on the mechanisms of social pressure is still limited by several constraints, e.g. limitations in the assessment, insufficient consideration of gender-specific mechanisms as well as a lack of longitudinal findings. Hence, the dissertation examines the role of appearance-related pressure in the development of body dissatisfaction during adolescence by conducting three consecutive steps of investigation. By the development of a comprehensive and reliable instrument (1) this work aims at comparing the occurrence while considering interpersonal variations in the perception of different kinds of social pressure (2) as well as investigating the potential risk of these factors in the development of body dissatisfaction (3). The investigation was conducted in different samples of high school students from grade 7 to 9 (main sample: N = 1112, mean: 13.4 ± 0.8 years of age) using cross-sectional as well as longitudinal design. Additionally the psychometric quality of the questionnaire has been determined in clinical samples with eating and weight disorders. First, the Appearance-Related Social Pressure Questionnaire (FASD, Fragebogen zum aussehensbezogenen sozialen Druck) was developed which measures social pressure from peers and parents simultaneously while distinguishing eight types of pressure. The instrument has proved to be suitable for both, girls and boys, as well as for adolescents with different weight statuses. Evidence for its psychometric quality has been determined among population-based and clinical samples, which opens different fields of application. In a second step, the occurrence of the different aspects of pressure as well as variations according to individual characteristics (gender, age and weight status) have been investigated, revealing that girls as well as overweight students are particularly faced with social pressure. Moreover, the transition from early to middle adolescence as well as school transitions appear to be a crucial periods for the establishment of appearance related social pressure. Finally, the study delivers longitudinal evidence of the crucial impact of three types of social pressure on changes in body dissatisfaction over a one-year period. First of all, the results point to the crucial impact of friends in the development of body concerns among girls and boys alike. Second, the feeling of exclusion emerged as an important predictor of weight concerns in boys. Third, parental encouragement to control weight and shape play a crucial part in the development of body concerns. Summing up, the dissertation aimed at clarifying the role of appearance-related social pressure as a risk factor of body concerns during adolescence. The provided instrument allowed a reliable and differentiated analysis of different aspects of pressure. By this means, the results do not only point to interesting gender-specific mechanisms but also contribute to a better understanding of the impact of social pressure. These findings provide concrete targets for prevention and intervention and can also contribute to concretize already established sociocultural models.

Made available in DSpace on 2014-12-17T14:55:03Z (GMT). No. of bitstreams: 1 MarcosCMAP.pdf: 634837 bytes, checksum: 4a0393d7f7dbe297fda66b1ed1859c99 (MD5) Previous issue date: 2006-02-20 / There are some approaches that take advantage of unused computational resources in the Internet nodes - users? machines. In the last years , the peer-to-peer networks (P2P) have gaining a momentum mainly due to its support for scalability and fault tolerance. However, current P2P architectures present some problems such as nodes overhead due to messages routing, a great amount of nodes reconfigurations when the network topology changes, routing traffic inside a specific network even when the traffic is not directed to a machine of this network, and the lack of a proximity relationship among the P2P nodes and the proximity of these nodes in the IP network. Although some architectures use the information about the nodes distance in the IP network, they use methods that require dynamic information. In this work we propose a P2P architecture to fix the problems afore mentioned. It is composed of three parts. The first part consists of a basic P2P architecture, called SGrid, which maintains a relationship of nodes in the P2P network with their position in the IP network. Its assigns adjacent key regions to nodes of a same organization. The second part is a protocol called NATal (Routing and NAT application layer) that extends the basic architecture in order to remove from the nodes the responsibility of routing messages. The third part consists of a special kind of node, called LSP (Lightware Super-Peer), which is responsible for maintaining the P2P routing table. In addition, this work also presents a simulator that validates the architecture and a module of the Natal protocol to be used in Linux routers / Entre as diversas abordagens para se aproveitar os recursos computacionais ociosos existentes nas folhas da Internet, ou seja, nas m?quinas dos usu?rios, as redes peer-to-peer (P2P) v?m ganhando destaque especial nos ?ltimos anos devido principalmente ? sua escalabilidade, desempenho e toler?ncia ? falhas. As arquiteturas P2P atuais, entretanto, ainda apresentam alguns problemas como a sobrecarga nos n?s devido ? realiza??o do roteamento de mensagens, o n?mero elevado de n?s reconfigurados devido ? mudan?as de topologia da rede, a exist?ncia de tr?fego de roteamento dentro das redes das organiza??es que n?o ? destinado a nenhuma de suas m?quinas e ? aus?ncia de rela??o entre a proximidade dos n?s na rede P2P e a proximidade desses n?s na rede IP. Embora algumas arquiteturas considerem essas dist?ncias na rede IP, o fazem atrav?s de m?todos que requerem a troca de informa??es constantemente. Nesse trabalho n?s propomos uma arquitetura P2P para resolver os problemas citados. Essa arquitetura ? composta por tr?s partes. A primeira parte consiste em uma arquitetura P2P b?sica, chamada SGrid, que mant?m a rela??o dos n?s na rede P2P com suas posi??es na rede IP e atribui regi?es de chaves adjacentes para n?s de uma mesma organiza??o. A segunda parte consiste em um protocolo chamado NATal (Routing and NAT application layer) que estende a arquitetura b?sica para retirar dos n?s a fun??o de roteamento de mensagens. A terceira parte consiste de um tipo especial de n?, chamado LSP (Lightware Super-Peer), que ? o respons?vel pela manuten??o das tabelas de roteamento P2P. Al?m da descri??o da arquitetura proposta e da especifica??o dos protocolos SGrid e NATal, esse trabalho apresenta o simulador desenvolvido para validar a arquitetura e um m?dulo para ser utilizado em roteadores Linux que implementa o protocolo Natal

The main goal of this thesis is to familiarize the reader with the inclusion of the gifted child into the classroom collective. The theoretical part focuses on the identification of gifted children, their behavior among peers and role in groups. Furthermore, the roles of the teacher, his education and ways of working with gifted. The practical part is engaged in the exploration, how teacher work in teams with gifted children, at 1st grade of elementary school.

Doctor of Philosophy / Department of Psychology / Mark A. Barnett / To date, the research testing the predictors of relational aggression has largely mirrored that of the more robust physical aggression literature. Similar to the physical aggression literature, research on relational aggression has focused on age and gender differences and, more recently, the possible associations between relational aggression and other variables. However, there is a lack of research investigating the parent and peer behaviors that could potentially model relationally aggressive behavior in children. The current study drew upon social-cognitive models of aggression to test such associations. Specifically, I measured parents’ use of psychological control with their children, parents’ use of manipulative behavior with their children and other adults, and peer groups’ use of relational aggression to determine whether these variables predicted children’s use of relational aggression. It was expected that the aforementioned variables would be positively associated with children’s use of relational aggression. One hundred and sixty-five fourth-, fifth-, and sixth-grade children (52% male) enrolled in public elementary schools in the Midwest participated in the study. Additionally, 137 female and 70 male caregivers also participated. The children completed questionnaires to measure a) their use of relational aggression, b) their peers’ use of relational and physical aggression, c) the cohesiveness and distinctiveness of their main group of friends, and d) their parents’ use of psychological control. The caregivers also completed questionnaires that assessed a) their behaviors toward other adults when angry, b) how they respond to their children’s misbehavior, and c) social desirability. Consistent with Social Learning Theory and the Social-Cognitive Theory of Aggression, children’s use of relational aggression was positively related to their mothers’ use of psychological control and to their peer groups’ use of relational aggression especially when that peer group was seen as relatively cohesive and distinct. In addition, children’s use of relational aggression was more strongly associated with their parents’ use of psychological control than was their peer groups’ use of relational aggression. The current study was the first to examine and compare the associations between parent- and peer-related variables and children’s use of relational aggression.

This study tests the predictions made by several causal theories proposing different etiologies for childhood-onset and adolescent-onset conduct problems. It investigates a variety of causal factors proven to be important for the development of antisocial behaviors, specifically neuropsychological/cognitive deficits, temperamental vulnerabilities, dysfunctional parenting, deviant peers, and rebelliousness. Current theories generally agree that the early onset pathway is distinguished by interactions between a child with a difficult temperament and dysfunctional parent-child interactions. However, theories differ as to whether they emphasize the temperament and neurocognitive deficits of the child, or the parenting behaviors. In the adolescent onset pathway, theories typically focus on the importance of affiliation with deviant peers but differ as to whether this is attributed to a personality characterized by the rejection of traditional values and rebelliousness as leading to this association or failures in parenting practices. Seventy-eight pre-adjudicated adolescent (ranging in age from 11 to 18) boys housed in two short-term detention facilities and one outpatient program for boys at risk for involvement in the juvenile justice system in southeastern Louisiana participated in the current study. The sample was ethnically diverse (56% African-American) and largely came from facilities serving either a large urban or a largely suburban and rural region of the state. The sample was divided into two groups based on the youngest age of a self-reported delinquent act or parent-reported severe conduct problem. The childhoodonset group (n =47) displayed at least one serious antisocial behavior prior to age 12, whereas the adolescent-onset group (n =31) did not. As predicted, the childhood-onset group showed greater levels of dysfunctional parenting and CU traits. Contrary to predictions, however, this group also showed the strongest affiliation with deviant peers. The only variable strongly associated with the adolescent onset group was lower scores on a measure of traditionalism which indicates less endorsement of traditional values and status hierarchies. The implications of these results for understanding different causal trajectories to antisocial behavior and for designing better prevention and treatment programs for antisocial youth are discussed.

Thesis advisor: Daniel J. McKaughan / When you learn that you disagree with an epistemic peer, what should you believe about the proposition you disagree about? The epistemology of peer disagreement has made considerable progress in answering this question. But to this point, we have largely neglected a significant resource which can help us to determine how peers who disagree can rationally respond to their disagreement. Closely examining actual disagreements in scientific and nonscientific contexts can help us to understand why peers find themselves in disagreement. And knowing why you disagree with your peer can help you to understand how you can rationally respond to your disagreement. Examining specific scientific and nonscientific disagreements shows us that some peers disagree because they disagree about what evidence is relevant to the proposition they disagree about. Dual disagreements about propositions and evidence can be found in numerous areas of disagreement, including ethical, political, philosophical, and scientific arenas. When you find yourself in these dual disagreements, you can rationally believe that your belief is rational and that your peer’s belief, though it diverges from yours, is also rational. But some philosophers have suggested that this situation in which you and your peer have rational beliefs and recognize each other as holding rational beliefs is impossible. A primary motivation for thinking that at least one of you must be believing irrationally is the thesis of Uniqueness about rationality, which states that at most one doxastic attitude can be rationally held given a body of evidence. However, when you consider the epistemic context of your actual disagreements with your peer carefully, you need not think that at least one of you is believing irrationally, even if Uniqueness is true. In response to your disagreement with a peer who disagrees with you both about what evidence is relevant to the proposition you disagree about and the proposition itself, you can even rationally hold a belief which splits the connection between your evidence and your evidence about your evidence. When we consider their epistemic contexts in full relief, peers in disagreement can simultaneously be believing rationally, even if only one of them is right. / Thesis (PhD) — Boston College, 2019. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Philosophy.

Thesis advisor: Mariela Páez / Across preschool classrooms in the United States, free play comprises the largest percentage of children’s daily activity time (Chien et al., 2010; Fuligini et al., 2012). During free play, preschoolers may frequently engage in sociodramatic play (SDP), or pretend play where groups of children take on assigned roles with implicit rules (Smilansky & Shefatya, 1990). Research has demonstrated the academic and social benefits of SDP engagement (e.g., Diamond et al., 2007); however, much of this work has addressed SDP in curricular and intervention contexts, in which teachers play a large role in facilitating the play. Fewer studies have explored SDP in free play contexts with minimal teacher scaffolding, and even fewer have studied this play in classrooms comprised of cognitively, culturally, and linguistically diverse students, such as those participating in Head Start programs. This study investigated individual and peer factors that relate to SDP occurring in the context of free play among children (n=50) in five diverse mixed-age Head Start classrooms. A mixed methods approach was used to examine relations between children’s individual characteristics and abilities, classroom peer networks, and SDP outcomes. Sources of data included: 1) naturalistic observations of children’s free play, 2) assessments and demographic surveys of individual children, and 3) sociometric and semi-structured interviews with child participants. Results from multiple regression and hierarchical cluster analyses were merged with case studies of children who engage in exemplary amounts of SDP to enhance the understanding of individual and peer factors related to sociodramatic play. Findings indicated that narrative skills, home language background, gender, membership in a cohesive peer subgroup, and teacher presence were related to high amounts of SDP engagement. Implications for future research and for preschool practitioners are discussed. / Thesis (PhD) — Boston College, 2019. / Submitted to: Boston College. Lynch School of Education. / Discipline: Teacher Education, Special Education, Curriculum and Instruction.