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PubMed1989

Pretend play with mothers and siblings: relations between early performance and partners.

Although the role of the mother in assisting early pretend play has been established in other studies, little is known about the sibling's contribution. Using naturalistic observational methodology, this study investigates whether 2-year-old infants' co-operative pretend play varies when playing with their mother and 4-5-year-old sibling. The results suggest marked differences in frequency of production of various transformational types in each social setting, and one type of play only appears in games with the sibling. Possible "facilitation" by the play partner is discussed. The classificatory limitation of existing normative developmental schedules of early pretending is noted.

Child, Preschool↗
PubMedDate not supplied

[Sibling relations from the family therapy perspective--support, attachment, rivalry and envy].

In family therapy, during the last years more and more importance is attached to the dynamics of the sibling subsystem. In the present paper differences between them as well as similarities are discussed from the point of view of family theory. Relevant dimensions like support, attachment, rivalry and envy between brothers and sisters contribute essentially to the family dynamics. In this clinically orientated paper, we describe by means of a case example how the couple's conflicts after their separation is unconsciously repeated in the sibling subsystem. It is shown how the intergenerational dynamics can be interrupted by the initiative of the children and the initiated family therapy.

Adolescent↗
PubMedDate not supplied

[Sibling relations in processing sexual trauma: the film "The Celebration"]].

Movies appeal as a subject of psychoanalytical art interpretation due to their structural closeness to "scenical understanding" and enrich our Insight into human relationships. The movie Das Pest is worth seeing because of its particular aesthetic form and because of its message about sibling relationships. According to the assessment of film journalists the movie shows the dismantling of middle class society and the reinscenation of destructive violence. In this author's interpretation, however, the movie leads out of passing violence on through the generations and herein differs from numerous current movies about siblings. The movie is about the process of a constructive development in the reciprocal relationships between four siblings and shows this in the formal structure of a film. With countertransference and our "viewing habits" the author discusses why this development could be overlooked. The movie shows neither a sibling fixation nor an idealization of sibling love as a regressive, timeless topos, but rather a horizontal relationship process. This is open towards partners and allows for a conciliatory attitude towards the parents. The movie is able to show this process conclusively under the burden of intergenerational violence and in its creativity enriches our image of sibling relationships.

Adolescent↗
PubMed1994

Cold acclimation in genetically related (sibling) deciduous and evergreen peach (Prunus persica [L.] Batsch). II. A 60-kilodalton bark protein in cold-acclimated tissues of peach is heat stable and related to the dehydrin family of proteins.

In several plant species, certain cold-regulated proteins share unique properties. These proteins are (a) heat stable and (b) hydrophilic and are related to the Group 2 late embryogenesis abundant or dehydrin family of proteins. Our previous work with sibling deciduous and evergreen peach genotypes demonstrated a correlation between the level of accumulation of certain bark proteins and cold-acclimation potential of these tissues. Here we identify a 60-kD bark protein in peach (Prunus persica [L.] Batsch), PCA60 ("peach cold acclimation"), that is accumulated during cold acclimation and is heat stable. Immunological studies indicated that this protein is related to the dehydrin family of proteins and accumulates at much higher levels in the bark tissues of the deciduous genotype than in the evergreen. Amino acid composition indicated that the 60-kD protein has a compositional bias for glycine (24%), glutamic acid/glutamine (11.4%), aspartic acid/asparagine (10%), and threonine (9.6%), contains relatively low levels of aromatic amino acids (phenylalanine and tyrosine), and is rich in hydrophilic amino acids. A novel characteristic of the 60-kD cold-acclimation protein is the presence of a repeating nine-amino acid sequence. A five-amino acid stretch, which is included within this repeating motif, shares striking homology with other cold-regulated proteins and dehydrins.

Acclimatization↗
PubMedDate not supplied

[Contact behavior of elderly females living alone from the social psychologic viewpoint--an exploratory study. II: Social contact with children (close relations) and with other relatives (siblings, extended family)].

After a theoretical introduction, the authors present the results of an exploratory study on the social contacts between older women living alone and their children and other relatives, respectively. It seems to be of special importance for future examinations not to confine oneself to recording the quality and the quantity of such contacts. The necessity of a description of the social contacts in substance in the individual fields of contact is pointed out.

Aged↗
PubMed1995

Chromosome banding patterns in the unisexual microteiid Gymnophthalmus underwoodi and in two related sibling species (Gymnophthalmidae, Sauria).

Cytogenetic investigation of three species of the genus Gymnophthalmus (the unisexual G. underwoodi, G. leucomystax and Gymnophthalmus sp.n., a new, undescribed red-tailed species) documented three different karyotypes, all with 2n = 44. Chromosomes from fibroblast cultures were studied after routine Giemsa staining, CBG-banding, RBG-banding, and Ag-NOR staining. The unisexual species showed a very distinctive karyotype from the one previously described that, paradoxically, corresponded to the predicted karyotype of one of its parental species. Our chromosome data unequivocally show that there are two parthenogenetic species with two different mechanisms of origin under the name underwoodi.

Animals↗
PubMed1993

The psychosocial functioning and family environment of depressed adolescents.

OBJECTIVE: This study examined measures of functional impairment and family relations in a sample of 62 adolescents with major depressive disorder (MDD) and 38 normal controls with no history of psychiatric illness. METHOD: Ratings of the following domains were obtained: mother-child relations, father-child relations, spousal relations, sibling relations, peer relations, and school performance. Ratings of each domain for the 3-month period preceding the assessment were derived from information obtained using a semistructured interview administered independently to the adolescents and one of their parents. RESULTS: Adolescents with MDD were found to have severe difficulties in all areas. Ninety percent of the depressed adolescents had scores greater than 2 SD above the mean of the normal controls on one or more of the domain ratings. In addition, adolescents with difficulties in parent-child relations were more likely than those adolescents without problems in family relations to have difficulties in peer relations and school performance. CONCLUSIONS: The authors discuss the importance of systematically examining psychosocial variables in future studies of the etiology, course, and treatment of MDD in adolescents.

Adolescent↗
PubMed1988

Childcare responsibilities, peer relations, and sibling conflict: older siblings of mentally retarded children.

Household and childcare responsibilities, peer contacts, and out-of-home activities of older same-sex siblings of mentally retarded children as compared to a group of matched nonhandicapped children were examined. Older siblings of retarded children, particularly older sisters, assumed multiple caretaking responsibilities. For these siblings, increased childcare responsibilities were associated with sibling conflict and decreased opportunities for peer contacts and out-of-home activities. As a group, however, siblings of retarded children did not differ from their agemates in frequency of contact with friends or participation in out-of-home activities. Retarded younger siblings had less contact with friends than did their nonhandicapped agemates. Within-group differences appeared to be more important in understanding sibling risk status than whether the child had a younger retarded sibling.

Child↗
PubMed2005

Sibling relationships as contexts for delinquency training in low-income families.

The purpose of the study was to investigate the link between sibling relationships and antisocial behavior in 208 boys from low-income families. Sibling relational attributes and mother-target child (MTC) relationship quality were assessed when the target child (TC) was 10 years old. At ages 11 and 12, TC antisocial behavior and TC reports of peer antisocial behavior were evaluated. Results indicated that MTC negative relationship quality was significantly related to sibling conflict. In turn, sibling conflict was a significant predictor of antisocial behavior; sibling warmth/closeness was related to TC reports of peer antisocial behavior. Findings also indicated that sibling relationship quality was related to antisocial behavior after controlling for MTC negativity. Implications for interventions are discussed.

Adolescent↗
PubMed1998

Cross sectional study of the relation between sibling number and asthma, hay fever, and eczema.

OBJECTIVES: To document the relation between sibling number and atopic disease, and to assess the contribution of possible confounding factors to the protective effect of siblings in relation to asthma and hay fever. DESIGN AND SUBJECTS: Cross sectional survey by parental questionnaire in Tasmania, Australia, on 6378 children (92% of those eligible) who reached 7 years of age during 1995. METHODS: Exercise challenge lung function testing was conducted on 428 children. Analyses reported were conducted on singleton births only (n = 6158). RESULTS: The prevalences of a history of asthma ever, hay fever, and eczema were 27%, 19%, and 22%, respectively. Asthma and hay fever, but not eczema, were inversely related to sibling number, with evidence of a dose-response trend. The mean age at onset for asthma or wheezy breathing decreased as the number of siblings increased. The inverse association between sibling number and asthma or hay fever persisted after adjustment for several confounders, such as parental smoking or breast feeding, but did not persist after adjustment for household size in 1995. CONCLUSIONS: The protective effect of high sibling number could not be separated from household size at age 7, and it appears to be operating after birth and influences the age at onset of asthma symptoms. Further work to increase knowledge of how the protective effect of the presence of siblings works might have important implications for the understanding of the pathogenesis of asthma.

Age of Onset↗
PubMed1999

An initial look at sibling reports on children's behavior: comparisons with children's self-reports and relations with siblings' self-reports and sibling relationships.

The authors examined siblings' reports of children's depression, anxiety, and aggression, and their reports of the sibling relationship, and compared them with children's self-reports. In two samples, including 169 sibling pairs (age M = 9.98 years, SD = 1.51), no significant differences emerged in the levels of depression and anxiety found in siblings' reports of children's behavior and children's self-reports, although siblings reported children to have significantly higher levels of aggression than the children self-reported. Age, the difference in ages between siblings, sex, and sibling sex were not related to siblings' reports of children's behavior. The relations between children's and siblings' reports of children's behavior were significant, yet moderate (average r = .22). Both siblings' self-reports of internalizing behavior and their perceptions of aspects of the sibling relationship (affection, rivalry, hostility, and satisfaction with the sibling relationship) explained significant, and unique, variance in siblings' reports of children's internalizing behavior. The findings for aggressive behavior were similar, although siblings' perceptions of affection in the sibling relationship were not significantly related to their reports of children's aggression. The potential uses and benefits of sibling reports of children's behavior, and sibling and family relationships, are discussed.

Adolescent↗
PubMed2000

Ascertainment bias in the estimation of sibling genetic risk parameters.

The sibling recurrence risk, sibling relative risk, and locus-specific sibling relative risk are fundamental quantities in genetic epidemiologic research and are often estimated without accounting for the sampling scheme. For data generated under some genetic models, bias of estimates may be large if the sampling method is incorrectly modeled. In this paper, we explore the relationship between ascertainment of sibships and estimation and interpretation of genetic risk parameters. In particular, we observe that, although traditional definitions of these population parameters are consistent with each other, implied assumptions about ascertainment and the nature of ascertainment correction differ. In the absence of ascertainment correction, unbiased estimation of sibling recurrence risk and overall sibling relative risk requires single ascertainment, while unbiased estimation of locus-specific sibling relative risk requires complete ascertainment.

Bias↗
PubMed1999

Familial primary biliary cirrhosis reassessed: a geographically-based population study.

BACKGROUND/AIMS: Development of primary biliary cirrhosis in the close relatives of patients with the disease has been reported in several series, suggesting a genetic component to disease susceptibility. In this study we set out to calculate, as accurately as possible, the prevalence of familial primary biliary cirrhosis in a geographically-based population. Using local population prevalence data, we have also calculated the first-degree relative, sibling and offspring relative risks of overt primary biliary cirrhosis development. METHODS: All patients with definite or probable primary biliary cirrhosis in the city of Newcastle-upon-Tyne, England, were identified by an exhaustive case-finding search and were prospectively interviewed by a single investigator. Full details of family pedigree and familial primary biliary cirrhosis history were obtained. RESULTS: One hundred and seventy-three patients were identified, with 160 participating in the study. Thirteen reported a family history of primary biliary cirrhosis. In three cases, both relative pairs were within the study group. The prevalence of a positive family history of primary biliary cirrhosis was therefore 10/157 (6.4% [95% Confidence Interval 2.6-10.2%]), 8/10 cases occurring in first-degree relatives. The patients had a total of 1118 first-degree relatives (live or dead) and 468 siblings. The first-degree relative prevalence of primary biliary cirrhosis was 0.72% [0.2-1.2%] (siblings 0.41% [-0.2-1.0%]). The offspring prevalence was 1.2% [0.04-2.4%], (2.3% [0.1-4.5%] for daughters). The sibling relative risk (lambda(s)) was 10.5. CONCLUSIONS: The overall prevalence of definite or probable primary biliary cirrhosis in the first-degree relatives of existing patients is <1%. The risk of disease is not, however, uniform, the highest prevalence being seen in the daughters of patients. Suspicion of disease should therefore be highest in this relative group. The calculated lambda(s) for primary biliary cirrhosis in this geographically-based study is significantly lower than previous estimates from case-note-derived case series, but similar to values seen in other autoimmune diseases.

Adult↗
PubMed1970

Intelligence quotient pattern over age: comparisons among siblings and parent-child pairs.

Comparisons between sibling and parent-child pairs with unrelated control pairs matched for year of birth and parental education were made to determine the relative heritability of the general level of intelligence quotient as opposed to that of the sequential pattern of IQ change over age (3 to 12 years). There was greater similarity among related siblings relative to matched controls for general level than for pattern of IQ over age. Relationships between the IQ's of children and that of their parents as children were not consistent across age.

Age Factors↗
PubMed1995

Long-term outcome of Haemophilus influenzae meningitis in Navajo Indian children.

OBJECTIVES: To determine the long-term neurologic, cognitive, and educational outcomes of Navajo children who survived Haemophilus influenzae type b meningitis. DESIGN: Retrospective cohort study, with 3.6- to 15.0-year follow-up. SETTING: Navajo Indian reservation. PARTICIPANTS: Population-based cohort of 76 Navajo children with Haemophilus meningitis at less than 5 years of age between 1975 and 1986, with 41 (54%) consenting to undergo follow-up in 1990. Each case was matched to one nearest-age sibling and one unrelated age-matched control. MAIN OUTCOME MEASURES: Standard intelligence test scores, neurologic abnormalities, and school performance. RESULTS: The mean IQ for cases was lower than that for siblings (79 vs 87, P = .006) or age-matched controls (79 vs 95, P < .001). Twenty-nine percent of cases had severe neurologic sequelae, including mental retardation (24%), severe hearing loss (5%), cerebral palsy (7%), and seizure disorder (12%). Eight percent of siblings (relative risk for cases vs siblings, 8.0; P = .05) and 2% of age-matched controls (relative risk vs cases, 10.0; P = .01) had mental retardation. No siblings or age-matched controls had any other severe neurologic sequela. Twenty-nine percent of cases, 23% of siblings (relative risk, 2.5; P = .45), and 0% of age-matched controls (P = .001) required special education services, while 42% of cases, 23% of siblings (relative risk, 3.3; P = .10), and 11% of age-matched controls (relative risk, 4.0; P = .005) had been retained in a grade in school. CONCLUSIONS: Navajo survivors of Haemophilus meningitis suffer more long-term neurologic, cognitive, and school-related disability than siblings or age-matched controls. They may also suffer higher morbidity than Haemophilus meningitis survivors in the general population.

Adolescent↗
PubMed1997

A family study of autism: cognitive patterns and levels in parents and siblings.

First-degree relatives of 99 autism probands and of 36 Down's syndrome controls were assessed with standardised tests of intellectual functioning, reading, and spelling. Higher mean verbal IQ scores, and discrepancies in favour of verbal scores, were characteristic of autism relatives. No consistent differences were found on performance scales, reading, and spelling tests. Among autism relatives, siblings affected with the broad phenotype of autism had significantly lower IQ scores and poorer reading and spelling performances than unaffected siblings. However, the small size of the cognitive difference and the lack of a distinctive cognitive profile indicates that standardised cognitive measures used in this study are unlikely to improve the operationalised definition of the broad phenotype of autism. The slightly superior verbal performance of relatives in the autism group might represent some form of heterozygote advantage.

Adolescent↗