Detecting large cohesive subgroups with high clustering coefficients in social networks

Clique relaxations are used in classical models of cohesive subgroups in social network analysis. Clustering coefficient was introduced more recently as a structural feature characterizing small-world networks. Noting that cohesive subgroups tend to have high clustering coefficients, this paper introduces a new clique relaxation, α-cluster, defined by enforcing a lower bound α on the clustering coefficient in the corresponding induced subgraph. Two variations of the clustering coefficient are considered, namely, the local and global clustering coefficient. Certain structural properties of α-clusters are analyzed and mathematical optimization models for determining α-clusters of the largest size in a network are developed and validated using several real-life social networks. In addition, a network clustering algorithm based on local α-clusters is proposed and successfully tested.     

Social supports preferred by the teachers when facing school violence

Objectives

This study aims at examining whether the social support sources of teachers differ depending on the variables of gender and seniority when they encounter violence at school and investigating their opinions on precautions against school violence.

Methods

Data was collected via a questionnaire from a sample of 179 female and 166 male Turkish teachers. Chi-square and Mann-Whitney U tests were used for data analysis.Results: Male and female teachers preferred to share the experience of exposure to verbal (χ² (5) = 22.81, p < .01), physical (χ² (5) = 36.64, p < .01), emotional (χ² (5) = 26.13, p < .01) and sexual violence (χ² (5) = 37.43, p < .01) at school with different social support sources. Male teachers preferred their colleagues as social support sources whereas female teachers preferred their spouses/families. Social support sources which teachers prefer when they face any type of violence other than sexual violence differ due to the length of teaching experience. School administrators and counselors are not among the social support sources of teachers when they were exposed to violence.

Conclusions

Turkish teachers' preferences related to their victimization experiences indicate a need for prevention program encompassing teachers, school counselors and administrators.     

Validation of sociometric structure by data on individuals' attributes

Longstanding challenges to relate sociometric structure of an intact social group to other social variables are answered first by obtaining a partition of a set of 69 inmates in Cook County Jail, using a clustering algorithm (CONCOR) applied to sociometric data. We then demonstrate that the resulting partition can be accounted for by substantively interpretable variables (e.g. number of years of school prior to incarceration) measured on the individual inmates. The linear discriminant function used to relate the two types of data does a good job of accounting for processes generating sociometric ties of friendship. It is argued that this methodology can be used to study the diversity of inmate organizational structure.     

Measurement error in network data: A re-classification

Research on measurement error in network data has typically focused on missing data. We embed missing data, which we term false negative nodes and edges, in a broader classification of error scenarios. This includes false positive nodes and edges and falsely aggregated and disaggregated nodes. We simulate these six measurement errors using an online social network and a publication citation network, reporting their effects on four node-level measures – degree centrality, clustering coefficient, network constraint, and eigenvector centrality. Our results suggest that in networks with more positively-skewed degree distributions and higher average clustering, these measures tend to be less resistant to most forms of measurement error. In addition, we argue that the sensitivity of a given measure to an error scenario depends on the idiosyncracies of the measure's calculation, thus revising the general claim from past research that the more ‘global’ a measure, the less resistant it is to measurement error. Finally, we anchor our discussion to commonly-used networks in past research that suffer from these different forms of measurement error and make recommendations for correction strategies.     

The extent of family and school social capital promoting positive subjective well-being among primary school children in Shenzhen, China

This study aimed to examine, first, the extent to which variations in family and school social capital can be explained by child's differing socioeconomic and demographic background and school characteristics; and second, the extent to which family and school social capital in combination might be associated with variations in child subjective well-being in Shenzhen, China. This study was a cross-sectional survey design, using stratified random sampling. A total of 1306 sixth-grade primary school children and their parents were drawn from 16 schools, and a self-administered questionnaire was used. The results suggested that gender difference, the only child status at home and hukou status had impacts on family and school social capital accrued among primary school children in Shenzhen. There were also links between child's perception of connectedness to their parents, peers, and teachers, and their positive child subjective well-being.     

Ecological Influences on School Achievement in a Diverse Youth Sample: The Mediating Role of Substance Use

This study's purpose was to examine the extent to which closeness to family, peers, and school was associated with substance use and school achievement, based on the integrative model of ecological theory, social attachment theory, and social learning theory. A secondary data analysis was conducted on the first wave of the National Longitudinal Study of Adolescent Health (Add Health). The final sample yielded 3,147 boys and 3,356 girls.

A structural equation model was employed to test a hypothesized model. School closeness was found to be a primary ecological factor that significantly influenced school achievement while substance use emerged as a critical mediator of this relationship. Family closeness was negatively associated with school achievement. Also, substance use did not have a mediating function in the relationship between peer closeness and school achievement. No gender difference was found, except the relationship between family closeness and school achievement, in that family closeness had a significant, direct effect on school achievement among only boys but not girls.

The findings suggest that schools should strengthen adolescents' tie to school to promote their better academic success and to prevent them from substance use.     

The impact of school connectedness and teacher support on depressive symptoms in adolescents: A multilevel analysis

Using data from Waves I and II of the National Longitudinal Study of Adolescent Health (Add Health), this study examined the association between school connectedness, teacher support and depressive symptoms in a weighted sample of 11,852 adolescents from 132 schools. To account for the nested data, multilevel regression was utilized. The results indicated that higher school connectedness and getting along with teachers were significantly associated with fewer depressive symptoms. Findings offer implications for school social work practice and future research. Suggestions for future research are described and strategies to enhance school connectedness and teacher support are discussed.     

The elements of social capital in the context of six high schools

Purpose: The study described in this paper is part of a larger research project entitled, “Social Capital and Its Effects on the Academic Development of Adolescents At Risk of Educational Failure.” We drew the data for this study from in-depth case studies of six United States public and private secondary schools. We selected the schools based on two criteria: (1) they enrolled substantial proportions of students who would be considered to be at risk of educational failure due to their academic status, social background, or geographical location; and (2) they had qualities that led us to believe that the probability of finding school-based forms of social capital would be high. In selecting schools, we sought variation among settings, selecting case-study sites that allowed us to learn about how schools create and sustain social capital supportive of the academic development of students, particularly students characterized as at risk of failure.Background: In the first part of the larger research project, we used quantitative methods and a large, nationally representative sample of U.S. secondary schools and students. In that study, we documented the existence of a relationship between school-based social capital and such student outcomes as positive academic behaviors, achievement growth over the secondary years, and the probability of dropping out of high school. We operationalized the construct of social capital with two measures of the quality of students’ relationships with their teachers—the extent to which students saw their teachers as supportive and whether students sought guidance from their teachers outside of class. We believed, however, that school-based forms of social capital are more varied and complex than this. Moreover, we thought that it was important to examine in greater detail how social capital itself varies with the organizational and structural characteristics of high schools. Therefore, we embarked on a second phase of our study in which we relied on qualitative methods: specifically, the in-depth investigation of a small set of high schools thought to have social capital but exhibiting important variation on organizational and structural characteristics. Within these schools, we used field-based methods to examine social capital and students’ access to it.Methods: In general, we asked, “What does social capital look like in the six high schools that we studied?” “Do the quality or characteristic of social capital depend on a school’s student body composition, its programs and policies, or the ideologies and traditions that underlie its operation?” “If so, how do these factors influence the quality of school-based social capital that students have access to in a school?” “Are characteristics or elements of social capital especially prevalent or dominant in certain types of schools?” “Which types of schools, given our case-study sites?” “What do the results of these investigations tell us about the nature of social capital—its creation, maintenance, and usefulness to students and teachers in high schools?”Results: Our analyses of interview data and field notes suggest that school-based forms of social capital may be viewed from six different perspectives. These perspectives, which we refer to as elements of social capital in our paper, are:

• 1. Volition and perceived interest in membership. What are the opportunities that individuals have, both in terms of choices between schools and choice of programs within schools, to affiliate with others based on their interests? These choices may strengthen social capital within groups but weaken social capital between groups that comprise a school and its adjacent community.
• 2. Location and integration of social capital across social relationship networks. Where is social capital located in a school? Although we see the primary location for social capital to be between students and teachers, other networks of relationships also influence the extent to which students can gain access to social capital through teachers (e.g., teacher-to-teacher relationships or teacher-to-parent relationships). Integration across these relationships facilitates the formation of new relationships, trust building, and flows of information.
• 3. Impetus for social capital. What are the reasons that people seek to form supportive, collaborative relationships within schools? Such reasons may be individual or organizational, we argue. Nonetheless, social capital is most powerful when the impetus for its creation and maintenance coincide—that is, when organizational factors reinforce personal inclinations, perceived interest, and a sense of community.
• 4. Formation and stock of social capital. How much effort is required to create social capital? Social capital may occur naturally, as in small, rural schools, or it may require substantial effort and purposeful actions, as in large, urban schools. Natural forms of social capital may have negative consequences if they restrict exchanges with external groups to an extent that academic development is curtailed. Purposeful forms may also have negative consequences, if too much effort is required to create and sustain social capital, drawing deeply on already scarce resources.
• 5. Focus and quality of social capital. How is social capital used in a school? Social capital may be used for many different purposes, not all of which promote academic development. Social capital may be used to primarily promote social goals or ends, or even to undermine students’ development and a school’s academic mission. Differences in interest between school members diminish the focus of social capital, weaken its utility for academic purposes, and can create conflicts over its use and function.
• 6. Norms and social control. Do school norms and sanctions promote positive expectations and interactions between members of a school? Behavioral expectations and official actions are an important element of school-based forms of social capital. Over reliance on sanctions can undermine trust, just as does failure to sanction significant violation of rules. The consequences, norms, and sanctions for social capital depends on how much socialization is required to comply with norms, the perceived fairness of norms and sanctions, and the costs and benefits associated with compliance.
• 7. Conclusion: Using these conceptual lenses, we examine how social capital takes shape and is used in six different high schools. We provide examples of how each of the above six elements helps to understand the quality of interactions between students and teachers, as well as the educational environment in which students’ academic development takes place. In concluding the paper, we argue that social capital is a complex yet useful construct for examining the operation of high schools and the academic development of the students who attend them. Moreover, our examination of six high schools suggests that there can be too much social capital in schools and that social capital is most difficult to nurture in places that need it most. Using our field data, we give examples and provide further explanation for why this is so.

%Rather than provide an in-depth treatment of each element, we have instead attempted to lay the groundwork for deeper study and conceptual development of the notion of social capital in this paper. Each of the elements deserves more careful scrutiny, we believe, especially if we are to weave together in a meaningful fashion the conceptual threads that make social capital such an appealing construct. This initial study reveals some of the richness and complexity of social capital as a construct, as well as the utility of examining it through the six conceptual lenses that we use in this paper.     

Bildungschancen von Grundschülern: Die Bedeutung des Klassen- und Schulkontextes am Übergang auf die Sekundarstufe I

Do context characteristics of class and school have an impact on elementary school pupils’ educational opportunities in addition to the confirmed individual effects of social origin and academic performance? The paper investigates the influence of the contextual performance- and SES-level as well as of the ethnic composition of the context on the probability of (1) obtaining a recommendation for higher secondary schools (Gymnasium) and (2) effectively attending a higher secondary school. To this end, we base our theoretical framework on the distinction between primary and secondary effects, as introduced by Boudon (1974), and extend it by a contextual perspective, as well as the related decisions of parents and teachers. The analyses are based on a survey of all 4^th graders of elementary schools in the city of Wiesbaden (Germany) during the school year 2006/07. The context effects are modelled by using logistic multilevel models. The results show that the affiliation to both school- and class context explains about 10 per cent of the total variance of academic achievement. Additionally, there is evidence that the context effects significantly influence the individual educational opportunities in particular when the individual marks are controlled for (secondary context effects). Furthermore, especially the SES-related context composition influences the educational outcomes when controlling for relevant individual variables. With respect to the accomplished transitions to the Gymnasium, the performance level of the school also has significant impact. Contrary to previous studies, we could not detect any effect of the ethnic composition of the context when SES is controlled for. While there are effects of the class context as well as of the school context with the educational recommendation as dependent variable, only the school context is of relevance concerning the effectively attained school transition.     

Analytic strategies for longitudinal networks with missing data

Missing data are often problematic when analyzing complete longitudinal social network data. We review approaches for accommodating missing data when analyzing longitudinal network data with stochastic actor-based models. One common practice is to restrict analyses to participants observed at most or all time points, to achieve model convergence. We propose and evaluate an alternative, more inclusive approach to sub-setting and analyzing longitudinal network data, using data from a school friendship network observed at four waves (N = 694). Compared to standard practices, our approach retained more information from partially observed participants, generated a more representative analytic sample, and led to less biased model estimates for this case study. The implications and potential applications for longitudinal network analysis are discussed.     

Providing context to the implementation of health promoting schools: A case study

PurposeIssues related to program context are important components of population health interventions and particularly among complex, adaptive initiatives in schools. Health Promoting Schools (HPS) is a global approach to support early development of healthy behaviors among children and youth. The purpose of this study was to explicate the practical and contextual processes that influenced implementation of HPS in schools in Nova Scotia (Canada).MethodsUsing a case-study approach, data was collected using interviews (n = 14) with principals, teachers and parents, observations collected during school visits and document review in five diverse schools.ResultsCase study schools reported a variety of HPS practices and three key themes emerged that provided context to the processes that facilitated their implementation. The results suggest that although school characteristics (theme 1), like staff allocation, physical location and resources, are important, these barriers can be mitigated by building organizational capacity (theme 2) and establishing a supportive school community culture (theme 3).ConclusionsThe study provided insight to the variability in implementation by describing how contextual barriers were experienced and mitigated by schools. Establishing a broad system to support HPS, with collaboration across health and education sectors, could help to progress adoption, implementation and sustainability of HPS.     

Investigating the factor structure and validity of the family empowerment scale for parents of children with emotional disturbance in middle school

Parent empowerment involves the ability of caregivers to meet the needs of their family while maintaining feelings of control and is particularly important for families of children at-risk. It is necessary to establish reliable and valid tools to measure parent empowerment. The purpose of this study was to examine the internal factor structure, score reliability, and convergent validity of the FES scores with caregivers of middle school youth who had an Individualized Education Plan for Emotional Disturbance (ED) or Other Health Impairment (OHI) due to emotional or behavioral needs. A confirmatory factor analysis (CFA) was used to examine the internal structure the FES. Score reliability was examined by computing coefficient alpha (Cronbach, 1951) for each subscale score and computing Coefficient omega and coefficient omega hierarchical for good-fitting factor models and bifactor models. Convergent validity was examined by generating composite scores for each subscale, followed by computing Pearson correlations between FES subscale scores and scores from the PAM, CGSQ and the SDQ. Results indicated that the hypothesized three-factor model fit the data adequately. FES scores were reliable based on coefficient alpha and omega, and evidence of convergent validity with measures of parent activation, caregiver strain, and child behavior were moderate to strong. The results support the use of the FES with parents of middle school youth who have ED and further validate the three factor structure identified in the initial measure development. Practical and clinical implications of these findings include support for the use of the FES with this particular group of parents.     

Comparison of methods for positional analysis: Structural and general equivalences

This paper explores the conceptualization and measurement of social position in relational data. It is argued that social positions are evidenced in the interactions among individuals, which are encoded in measured social relations. Given a set of measured relations the task is to reveal social positions which consist of groups of individuals wth similar patterns of relations. Methods based on two alternative approaches are discussed. The first set of approaches is based on structural equivalence, and locates groups of similar individuals based on the extent to which they share identical ties with identical others. A second set of approaches, here called general equivalences, locates groups of similar individuals based on their sharing of “types” of ties with “types” of others. Procedures based on these different approaches are described and applied to actual data and to a constructed example. Results suggest that these different approaches identify different kinds of social groups. It is argued that structural equivalence is an unsuitable basis for analysis of relational data if the goal is detection of social positions.     

Typology of youth at risk

The absence of an accepted definition and classification for youth at risk has led to heterogeneous therapeutic grouping, often preventing appropriate intervention. The proposed typology, based on research conducted in Israel, is an initial attempt to classify these adolescents into relatively homogenous groups according to a complete set of personality and behavioral variables. The research tool was a questionnaire administered to 282 youths in distress and a contrast group of 217 normative youths. Cluster analysis that was used to construct the typology for the youths at risk, revealed four clusters: Suspended — relatively high scores in all positive adjustment measures, fewer-than-average deviant behaviors, higher-than average rate of suspension from school; Sociablists — relatively low positive adjustment measures, relatively high social adjustment, markedly higher-than-average negative adjustment measures (deviant behaviors and suspension from school); Alienated — significantly low positive adjustment measures, especially personal adjustment, higher-than-average negative adjustment measures; Loners — low positive adjustment measures, especially low social adjustment, lower-than-average negative adjustment measures (few deviant behaviors or school suspensions). The derived typology can be used to create interventions geared to personality and behavior rather than to external/demographic characteristics. A proposed intervention, with specialized programs for each group, is presented.     

Wo lernen Kinder mit sonderpädagogischem Förderbedarf besser? Ein Vergleich schulischer Kompetenzen zwischen Regel- und Förderschulen in der Primarstufe

Promoted by the UN Convention on the Rights of Persons with Disabilities, there is a trend towards the inclusive education of students with special educational needs (SEN) in regular classrooms. The present study addresses the question if achievement differences emerge between SEN students who attend a regular primary school and those who attend a school for special education. Based on data from the IQB-Ländervergleich Primarstufe 2011, a national assessment in German primary schools, the achievement of SEN students in regular schools (n?=?658) was compared to the achievement of students in special schools (n?=?413). Propensity score matching was applied to control for differences in achievement related characteristics between the two groups. After matching, SEN students in inclusive educational settings showed significantly higher test scores in German reading and listening comprehension as well as in mathematics than comparable SEN students in special schools. The effects were more pronounced for students with a special need of learning support than for students with speech and language-related special education support. Possible explanations for the higher achievement of SEN students in regular schools and for differential effects with regard to type of SEN are discussed.     

Modelling school participation based on the theory of planned behaviour / Modelamiento de la participación escolar basado en la teoría del comportamiento planificado

This study evaluated a predictive model of school participation based on Ajzen’s theory of planned behaviour. Attitudes towards social justice, perceived control and subjective norm on school participation were tested, mediated by the behavioural intention in favour of social justice in a sample of 443 secondary school students. The proposed model showed good fit (χ² = 597.740, df = 342; RMSEA = .041). The behavioural intentions towards social justice and perceived behavioural control were directly related to school participation. An indirect effect of perceived control on participation was detected, mediated by behavioural intention, but no evidence was found of the indirect effect of either attitude or norm on school participation.     

Of Sex and Romance: Late Adolescent Relationships and Young Adult Union Formation

To better understand the social factors that influence the diverse pathways to family formation young adults experience today, this research investigates the association between opposite‐gender relationships during late adolescence and union formation in early adulthood. Using data from the first and third waves of the Add Health (n= 4,911), we show that, for both men and women, there is continuity between adolescent and adult relationship experiences. Those involved in adolescent romantic relationships at the end of high school are more likely to marry and to cohabit in early adulthood. Moreover, involvement in a nonromantic sexual relationship is positively associated with cohabitation, but not marriage. We conclude that the precursors to union formation patterns in adulthood are observable in adolescence.