Familial resemblance for measures of reading performance in families of reading-disabled and control twins

In order to assess familial resemblance for measures of reading performance, data from 314 pairs of twins in which at least one member of each pair is reading-disabled [142 monozygotic (MZ) and 172 dizygotic (DZ) twin pairs], 273 matched control pairs (131 MZ and 142 DZ pairs), and their parents were subjected to both correlation and regression analyses. Results indicate that parent-offspring resemblance in families of reading-disabled probands does not differ substantially from that in families of controls. In general, the correlations and regressions for MZ twin pairs are greater than those for DZ twins; thus, individual differences in reading performance are due at least in part to heritable influences. As expected, regression coefficients are consistently larger than correlation coefficients for both parent-offspring and proband-cotwin comparisons in the reading-disabled sample, illustrating that regression analyses are more appropriate than correlations for assessing familial resemblance in selected samples.     

Nonshared environmental influences on individual differences in early behavioral development: a monozygotic twin differences study

The monozygotic (MZ) twin differences method was used to investigate nonshared environmental (NSE) influences independent of genetics. Four-year-old MZ twin pairs (N = 2,353) were assessed by their parents on 2 parenting measures (harsh parental discipline and negative parental feelings) and 4 behavioral measures (anxiety, prosocial behavior, hyperactivity, and conduct problems). Within-pair differences in parenting correlated significantly with MZ differences in behavior, with an average effect size of 3%. For the extreme 10% of the parenting-discordant and behavior-discordant distributions, the average NSE effect size was substantially greater (11%), suggesting a stronger NSE relationship for more discordant twins. NSE relationships were also stronger in higher risk environments, that is, families with lower socioeconomic status, greater family chaos, or greater maternal depression.     

Are there positive effects of having a sibling with special needs? Empathy and prosociality of twins of children with non-typical development

This study examined whether typically developing (TD) twins of non-TD children demonstrate enhanced empathy and prosociality. Of 778 Hebrew-speaking Israeli families who participated in a twin study, 63 were identified to have a non-TD child with a TD twin, and 404 as having both twins TD. TD twins of non-TD children (27% males) were compared to the rest of the cohort of TD children (46% males) on measures of empathy and prosociality. Participants were 11 years old. TD twins of non-TD children scored significantly higher than TD twins of TD children in a measure of cognitive empathy (d = .43). No differences were found in emotional empathy and prosociality. The specificity of the positive effect on cognitive empathy is discussed.     

What Happens With Comparison Processes When “the Other” is Very Similar? Academic Self-Concept Formation in Twins

According to the internal/external frame of reference (I/E) model (Marsh, 1986), individuals’ academic self-concept is strongly influenced by comparing their achievement in one domain with their achievement in other domains and with the achievement of others. Research has typically found contrast effects such that high-achieving others have a negative effect on students’ academic self-concept. Yet, what happens if the “other” is somebody very similar to oneself as in the case of monozygotic twins? We postulate and examine the mirror effect, which means that rather than serving as a contrast, the effect of the co-twin’s achievement parallels the effect of a monozygotic twin’s own achievement on academic self-concept. We used data from two school-aged cohorts (11- and 17-year-olds) from a representative sample (N = 4,202) of monozygotic and dizygotic twins in Germany. We regressed twins’ math and German self-concepts on their own and their co-twins’ mathematics and German achievement. Internal and external comparison effects as postulated in the I/E model were replicated for both monozygotic and dizygotic twins across both age groups. In line with our hypothesis, the mirror effect was found in monozygotic twins only: Co-twins’ achievement and twins’ own achievement showed a parallel pattern of positive effects on academic self-concept within each domain and negative effects on academic self-concept between domains, duplicating the I/E pattern. The mirror effect tended to be more pronounced for older monozygotic twins. We argue that the mirror effect is likely caused by high interpersonal similarity and constitutes a rare exception to the broad generalizability of contrast effects as assumed in the I/E model.     

A developmental-genetic analysis of common fears from early adolescence to early adulthood

A 51-item fear survey was administered to more than 2,600 adolescents and adults, including m ore than 400 pairs of like-sex twins, to examine developmental patterns and genetic influences on common fears. Raw data were age-sex standardized and subjected to factor analysis, and preliminary analyses of the factor scores documented both age and genetic effects. Some fears habituate with age; others exhibit sensitization; and, for some fears, intensity is uniform across development. Genetic effects were found for all factors, but the magnitude of such effects varied. Based on these initial analyses, developmental patterns of genetic and environmental influences on self-assessed fears were examined in 354 pairs of like-sex twins, ages 14-34. Hierarchical multiple regression was used to predict a twin's fearfulness from the co-twin's fear, the age and zygosity of the twin pair, and the interactions of these 3 predictors. For all fear factors, co-twin's score and the interaction of co-twin's score with pair zygosity significantly contributed to the prediction of a twin's fearfulness, but the magnitude of both effects varied for different fears. For 2 fear factors, Personal Death and Loved One's Misfortunes, 3-way interactions of co-twin's score, age, and zygosity were observed. The findings suggest significant genetic modulation of developmental patterns in the acquisition and maintenance of some adaptive fears.     

A typology of the three-year-old twin sibling relationship drawn from two different environments: School and home

The main purpose of this study was to describe the relational structure of child twins on the basis of their mothers' representations of their behavior in two everyday settings, at school and in the home. This study looks in particular at dependence on the co-twin and the dominant/dominated relationship in these two life environments. Fifty-seven questionnaires were gathered from mothers of twins three months after the children had begun preschool. A multiple correspondence analysis and an automatic classification of the data pointed out several relational structures of the twin sibling relationship, in contrast to the often stereotyped single representation of twinship. A secondary aim was to associate the observed relational structures with (a) the type of twinship and the sex makeup of the twin pair (b) the mothers' child-raising behaviors, which may or may not tend to turn the twins outward (first short separation of the children before preschool). Contrary to predictions, no particular relational structures could be differentiated on the basis of the type of twinship (monozygotic vs. same-sex dizygotic twins). On the other hand, pairs composed of a boy and a girl exhibited a number of specific characteristics. Parents who were in favor of short separations did not have children who were more co-twin independent in the school environment. However these twins showed a dominant/dominated relationship in the home.     

Masking of Children's Early Understanding of the Representational Mind: Backwards Explanation versus Prediction

3–5-year-olds heard a story involving identical twins, one of whom was absent when their ball was moved from one drawer to another. Children found it easy to infer that the twin who later went to the original location to get the ball was the one who had gone outside. Children in a comparison condition found it relatively difficult to predict where a (nonidentical) twin who was absent when the ball was moved, would search for the ball, and made the usual realist error. In further investigations involving variations on the identical twins task, children were equally successful at making the link between looking in the wrong place and having been absent, whether a backwards inference was required (as above) or a forwards one (inferring that the twin who went outside must now be the one who was at the wrong location). We ruled out one twin's physical association with the correct location as an artifactual explanation for facilitation. Children performed well whether or not the experimenter told them explicitly which twin did not know the ball had been moved. These findings support the view that children's early insight into the representational character of mind is masked in traditional prediction tests of false belief.     

Religious socialization of youth involved in child welfare

Increased religiosity is associated with a variety of improved outcomes, especially for youth in disadvantaged contexts. Although youth involved in child welfare may experience protective effects of religious participation or values, little is known about the impact of maltreatment on religious development. Using the National Survey of Child and Adolescent Well-Being, a nationally representative study of child welfare involved families, correlates of religious attendance and importance of religion for youth were investigated using weighted logistic regression at two waves 18 months apart. Youth self-reports of religious attendance and their ratings of its importance were associated with religious attendance of their caregivers, whether birth-parents or foster parents. Foster parents were more likely to attend religious services than birth parents. Increases in youth attendance from Wave 1 to Wave 2 were associated with high youth religious importance at Wave 1, whereas decreases in attendance were associated with moving between home and foster placements. Increases in religious importance from Wave 1 to Wave 2 were associated with religious attendance at Wave 1 and with the youth being Black.     

Why do faith secondary schools have advantaged intakes? The relative importance of neighbourhood characteristics,social background and religious identification amongst parents

This paper explores reasons why secondary schools with a religious character have pupil intakes that are of a higher social background and ability than their secular counterparts. We show that this is especially true across all regions in England once the characteristics of the pupils living in the local neighbourhoods are taken into account. Data from the National Pupil Database and the Longitudinal Survey of Young People in England are combined to show that likely reasons for this are complex. Parents reporting a religious affiliation are more likely to be better educated, have a higher occupational class and a higher household income. We also show that higher‐income religious families are more likely to have a child at a faith school than lower‐income religious families. Policy implications regarding the state‐funding of faith schools are discussed.     

Introduction

Abstract

The popularity of twins and non‐twins at school was studied longitudinally. Eight categories of pupils were distinguished by classifying them according to sex and twin type: monozygotic, dizygotic same‐sex, and dizygotic opposite‐sex as well as male and female non‐twins. Popularity ratings done by classmates on two different occasions at 11 and 13 years of age were analyzed. Differences in popularity between categories as well as changes in popularity over time were considered. The main results obtained seem to confirm and extend earlier findings reported in the literature about popularity differences between twins and non‐twins. For popularity change a relative similarity between categories was found significant, which implies that all categorical differences in popularity change can be better explained by the categorical differences in popularity at age 13 than by those at age 11.     

Gender differences in cognitive abilities of opposite-sex and same-sex twin pairs with reading disabilty

In order to compare the pattern of gender differences for cognitive measures in opposite-sex twin pairs to that in independent samples of twins from same-sex pairs, psychometric test data were obtained from four research-identified samples of children: (1) 96 pairs of opposite-sex fraternal twins in which at least one member of each pair is reading disabled; (2) 62 pairs of opposite-sex fraternal twins with no history of reading problems; (3) 167 males and 155 females from same-sex identical and same-sex fraternal twin pairs in which at least one member of each pair is reading disabled; and (4) a comparison sample of 126 males and 132 females from same-sex twin pairs with no history of reading problems. Results of multivariate analyses indicate that gender differences for cognitive measures are similar in twin pairs with and without reading disabilities. Moreover, a highly similar pattern of gender differences occurs for opposite-sex twin pairs who shared both prenatal and early postnatal influences and for independent samples of children from different families.     

The Relations of Children's Emotion Regulation to Their Vicarious Emotional Responses and Comforting Behaviors

The purpose of the present study was to examine the relations of children's emotional and behavioral regulation (as indexed by heart rate variability and coping styles) to their emotional and prosocial responses to a crying infant. Kindergarten and second-grade children's vicarious emotional responses (e.g., facial reactions and heart rate slope) and comforting behaviors were recorded while children heard a crying infant. The mothers of these children completed a measure designed to assess their children's coping responses when exposed to others in distress. It was found that children who were able to regulate their arousal (as assessed with heart rate variance) and typically responded instrumentally when exposed to others' needy states and conditions were relatively unlikely to become distressed and relatively likely to talk to and comfort the crying infant. Compared to boys, girls were found to be more responsive to the crying infant and were reported to engage in more direct, active coping responses when exposed to others in distress. The results are discussed in relation to research on emotion regulation and coping in interpersonal contexts.     

Attention interchanges at story-time: a case study from a deaf and hearing twin pair acquiring Swedish sign language in their deaf family

This case study longitudinally analyzes and describes the changes of attentional expressions in interchanges between a pair of fraternal twins, 1 deaf and 1 hearing, from the age of 10-40 months, and their Deaf family members. The video-observed attentional expressions of initiating and reestablishing interchange were grouped in 5 functional categories: "getting," "directing," "maintaining," "redirecting," and "checking" attention. Changes appear to be associated with development during the twins' ages of 10-13, 15-24, and 28-40 months, including the use of vision in communication. Although there are similarities in the changes of each twin's communicative initiations, there are also differences based on hearing status, personality, and use of modality. This is evident in the ways in which each twin's individual attention interchanges unfold over time; it is also connected with the parents' negotiating attention and arranging "seating positions" with them. Implications and findings for special educational purposes are discussed.     

Treating twins as individuals: Maternal educative practices

For twins’ parents, the process of building up each child’s individuality is more complex than for singleton’s parents. The dyadic interaction becomes a triadic situation and the mother has to face the problem of distinguishing one twin from the other without comparing them. The analysis of mother’s twin care patterns provides highly relevant information on the processes promoting twins’ individualization and maternal adjustment to the triadic situation. An empirical study illustrates this point of view. It surveys forty parents of twins on their attitudes towards twin rearing and observes parental behaviour in the home to assess consistency between statements of actual practices. Observation and correspondence analysis show that: I) Some types of child care are more conductive to implementing differentiation strategies than others (dress and choice of toys in contrast to bedtime and meals); 2) mothers of twins who are explicit about child rearing practices are generally coherent about putting them into practice; mothers with less explicit views are less inclined to try to individualize their twins; 3) SES and degree of physical resemblance between twins both affect the type of differentiation strategies.     

A comparative analysis of cognitive profiles: Monozygotic and dizygotic reading-disabled twins

Previous twin studies have provided evidence for genetic influences on reading disability (RD) or normal reading ability. The existence of subtypes of RD — each with its characteristic cognitive profile — has been suggested. Whether the etiology of the particular subtypes is genetic is uncertain. The present study examined within-pair comparisons of cognitive profiles (with respect to composites of general reading, symbol processing speed and sequential memory) in RD and control twins. Twin profile analysis were applied to these cognitive composites on 120 pairs of RD and control twins. Results showed a greater monozygotic (MZ) than dizygotic (DZ) resemblance in profiles indicating that individual differences in the patterning of cognitive abilities related to reading are genetically influenced.     

Social and Emotional Competencies: Contributions to Young African-American Children's Peer Acceptance

This study explored the relation between measures of emotional competence, behavioral regulation, and general social competence and African-American preschoolers' peer acceptance and popularity. These children came from both lower and middle income families. Data were collected in a short-term longitudinal study following children over the course of a school year. Gender, emotion knowledge, emotion regulation, and themes of violence in response to hypothetical situations of interpersonal conflict were strongly related to peer acceptance. The results are consistent with findings from middle-class Caucasian samples. The results also highlight the importance of potential influences of context and setting on children's peer status as well as the need for greater understanding of within- group variability with regard to these constructs. Given the growing evidence that peer relationships are related in important ways to children's school adjustment, understanding the development of positive peer relationships may help shed light on ways to help children achieve at more optimal levels in the school context.     

Individual differences in dynamic measures of verbal learning abilities in young twin pairs and their older siblings

We explored the genetic background of individual differences in dynamic measures of verbal learning ability in children, using a Dutch version of the Auditory Verbal Learning Test (AVLT). Nine-year-old twin pairs (N = 112 pairs) were recruited from the Netherlands Twin Register. When possible, an older sibling between 10 and 14 years old participated as well (N = 99). To assess verbal learning, non-linear curves were fitted for each child individually. Two parameters were estimated: Learning Speed (LS) and Forgetting Speed (FS). Larger twin correlations in monozygotic (MZ) than in dizygotic (DZ) and sibling pairs for LS and FS indicated the importance of genetic factors in explaining variation in these traits. The heritability estimate (percentage of variance explained by genetic factors) for LS was 43% for both twins and siblings. For FS heritability was estimated at 20% in twins and was slightly higher (30%) in their older siblings.     

Does Reading Cause Later Intelligence? Accounting for Stability in Models of Change

This study reanalyzes data presented by Ritchie, Bates, and Plomin (2015) who used a cross‐lagged monozygotic twin differences design to test whether reading ability caused changes in intelligence. The authors used data from a sample of 1,890 monozygotic twin pairs tested on reading ability and intelligence at five occasions between the ages of 7 and 16, regressing twin differences in intelligence on twin differences in prior intelligence and twin differences in prior reading ability. Results from a state–trait model suggest that reported effects of reading ability on later intelligence may be artifacts of previously uncontrolled factors, both environmental in origin and stable during this developmental period, influencing both constructs throughout development. Implications for cognitive developmental theory and methods are discussed.     

Family income, parent education, and perceived constraints as predictors of observed program quality and parent rated program quality

Observed child care quality and parent perceptions of child care quality received by children in poor (below Federal Poverty Line, FPL), low-income (between FPL and 200% of FPL), and non-low-income families were examined. Observations were completed in 359 center- and home-based child care programs in four Midwestern states and surveys were received from 1313 parents whose children were enrolled in these programs. Multilevel structural equation modeling revealed that programs with higher proportions of low-income families tend to have lower observed quality than programs with a higher proportion of non-low-income families. Programs with more educated parents tended to have better observed quality, however, more educated parents tended to have lower perceptions of quality.     

Religious education in state primary schools: the case of Catalonia (Spain)

In a pluricultural and multi-religious world, with high levels of social secularisation, the role of religious education in schools (especially in state-funded schools) has inundated political and academic debate throughout Europe, which is becoming increasingly more committed to integrating, non-confessional models. In this context, it is essential to analyse how religious education is managed in countries whose relationship between state and religion is still firmly rooted (as is the case of Spain), and what the action of schools and families is in contexts where confessional religion is maintained in schools. Based on a quantitative study of 380 representatives of primary school management teams, it is seen that one in four schools does not teach any type of religion, either due to a lack of demand from families or because the school chooses not to do so. In addition, the study shows the practical limitations of the confessional model to provide a response to the religious and secular diversity of our time, as the implementation of minority confessions is very scant while there is a primacy of the catholic confession in the religion subject.