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1.
Variations in pubertal timing, specifically age at menarche, have been associated with several antecedents, both genetic and environmental. Recent research has considered a broader range of environmental stressors and their influence on the development of the reproductive system. In this investigation, the following possible antecedents were considered: ( a ) hereditary transmission, ( b ) weight and weight for height, ( c ) stressful life events, ( d ) family relations, ( e ) absence or presence of an adult male in the household, and ( f ) psychological adjustment. Subjects were 75 premenarcheal girls between the ages of 10 and 14 drawn from a larger longitudinal investigation of adolescent development. Girls were from white, well-educated, middle- to upper-middle-class families and attended private schools in a northeastern urban area. While breast development, weight, family relations, and depressive affect were predictive of age at menarche, family relations predicted age at menarche above the influence of breast development or weight. A trend for maternal age at menarche to predict adolescent's age at menarche was found. Weight for height, presence of an adult male in the household, and stressful events were not predictive of age at menarche. These complex interactions of biological and psychosocial development demonstrated here may account to some extent for the inter- and intraindividual variation observed in pubertal development.  相似文献   

2.
Family rearing antecedents of pubertal timing   总被引：5，自引：2，他引：3  
Two general evolutionary hypotheses were tested on 756 White children (397 girls) studied longitudinally: (1) rearing experiences would predict pubertal timing; and (2) children would prove differentially susceptible to rearing. Analysis of pubertal measurements, including some based on repeated physical assessments, showed that mothering and fathering, earlier and later in childhood, predicted pubertal development, but only for girls, with negative parenting appearing most influential; maternal harsh control predicted earlier menarche. Rearing effects varied by infant negative emotionality, proving stronger (and opposite) for girls who in infancy were lower rather than higher in negativity. Maternal menarche, controlled in all analyses, was a stronger predictor than rearing. Findings are discussed in terms of theory development, genetic and nutritional influences, and sample restrictions.  相似文献   

3.
Ellis BJ  Essex MJ 《Child development》2007,78(6):1799-1817
Life history theorists have proposed that humans have evolved to be sensitive to specific features of early childhood environments and that exposure to different environments biases children toward development of different reproductive strategies, including differential pubertal timing. The current research provides a longitudinal test of this theory. Assessments of family environments, based on interviews with mothers and fathers, were conducted in preschool, and children were then followed prospectively through middle childhood. Adrenal hormones were assayed in a selected subsample of 120 children (73 girls) at age 7, and parent and child reports of secondary sexual characteristics were collected in the full female sample of 180 girls at age 11. Higher quality parental investment (from both mothers and fathers) and less father-reported Marital Conflict/Depression forecast later adrenarche. Older age at menarche in mothers, higher socioeconomic status, greater mother-based Parental Supportiveness, and lower third-grade body mass index each uniquely and significantly predicted later sexual development in daughters. Consistent with a life history perspective, quality of parental investment emerged as a central feature of the proximal family environment in relation to pubertal timing.  相似文献   

4.
Drawing on Belsky, Steinberg, and Draper's evolutionary theory of the development of reproductive strategies, we tested a model of individual differences in girls' pubertal timing. This model posits that a history of psychopathology in mothers results in earlier pubertal maturation in daughters, and that this effect is mediated by discordant family relationships and father absence/ stepfather presence. The model was supported in a short-term longitudinal study of 87 adolescent girls. In the primary test of the model, it was found that a history of mood disorders in mothers predicted earlier pubertal timing in daughters, and this relation was fully mediated by dyadic stress and biological father absence. In families in which the mother's romantic partner was not the biological father, dyadic stress accounted for almost half of the variation in daughters' pubertal timing. Stepfather presence, rather than biological father absence, best accounted for earlier pubertal maturation in girls living apart from their biological fathers. We propose that stepfather presence and stressful family relationships constitute separate paths to early pubertal maturation in girls.  相似文献   

5.
Using intergenerational, prospective data at ages 9 months, 7, 11, and 14 years from the nationally representative United Kingdom Millennium Cohort Study, this interdisciplinary study unpacks why 14-year-old adolescents with early perceived pubertal timing (PT) were more likely to drink alcohol (ever, frequent, and binge drinking) compared to those whose PT was on-time or late (5,757 girls, 5,799 boys; 80% White, 10% Asian, 3% Black, and 7% Other British). Parents allowed drinking among 22% (18%) of early PT girls (boys) compared to 11% of late PT adolescents; formal mediation models showed differences by PT in parent permissiveness and gains in alcohol-using friends primarily explained age 14 PT-drinking associations. Parental alcohol permissiveness should be a key prevention target for early PT adolescents.  相似文献   

6.
This study used a nationally representative sample of African American and Caribbean Black adolescent females to examine the relation between perceived pubertal timing relative to peers and discriminatory experiences. Participants included the 607 girls who participated in the National Survey of American Life-Adolescent (NSAL-A), and ranged in age from 13 to 17. Most African American girls perceived their development as on-time relative to their same-aged peers; whereas the majority of Caribbean Black girls perceived their development as earlier than their same-aged peers. The results indicated that girls who perceived that their pubertal development was earlier than their same-aged peers reported more general and racial discrimination experiences.  相似文献   

7.
This cohort study, including 15,810 children born 2000–2003 in Denmark, aimed to investigate the association between father absence in pregnancy or during childhood and pubertal development in girls and boys. The children were followed from 11 years of age and throughout pubertal development. Mean age differences according to exposure groups were estimated for each pubertal marker separately and for a combined pubertal marker. The results suggested that father absence in pregnancy and during childhood was associated with earlier pubertal development in girls, and father absence from late childhood was associated with earlier pubertal development in boys. The paternal investment theory, the psychosocial acceleration theory and the energetics theory were explored, and did not seem to explain the observed associations.  相似文献   

8.
This longitudinal study of 200 young adolescent girls and boys (mean age 11.6 years in sixth grade) investigated the hypothesis that differences in masculinity, femininity, and sex role attitudes would intensify across the sixth, seventh, and eighth grades (between 11 and 13 years of age) and that pubertal timing (early, on time, late) would play a role in this intensification. Analyses revealed that sex differences in masculinity and sex role attitudes increased across grades, but not sex differences in femininity. Pubertal timing was not associated with this gender divergence, although the evidence is equivocal for boys. The results provide support for gender intensification, but the role of pubertal timing may not be as strong as previously supposed.  相似文献   

9.
We tested predictions about psychosocial factors in the onset of menarche using data from a longitudinal study of 16-year-old girls. Belsky, Steinberg, and Draper have proposed a model that seeks to explain individual differences in maturational timing in terms of stressful childhood experiences. Their model hypothesizes that (1) individuals who grow up under conditions of family stress (2) experience behavioral and psychological problems which (3) provoke earlier reproductive readiness. In this study, the effect of family stressors on menarche was mediated by neither behavior problems nor weight, contrary to the predictions. However, the most provocative proposition advanced by Belsky et al. received empirical support. Family conflict and father absence in childhood predicted an earlier age of menarche, and these factors in combination with weight showed some evidence of an additive influence on menarche. A genetic inheritance model may provide a more parsimonious account of these data than does a conditional adaptation model derived from sociobiology.  相似文献   

10.
OBJECTIVES: The goal of the study was to assess the prevalence of date violence and rape in adolescents, to examine associations between date violence and rape and disordered eating behaviors and psychopathology, and to determine if these associations remain significant after controlling for sociodemographic characteristics and other physical and sexual abuse by an adult. METHOD: A Minnesota school-based sample of 81,247 boys and girls in 9th and 12th grades completed the 1998 Minnesota Student Survey. RESULTS: Overall, approximately 9% of girls and 6% of boys had experienced date violence or rape. Significant differences across race and grade were found. Date violence and rape is associated with higher rates of disordered eating behaviors and suicidal thoughts and attempts, and lower scores on measures of emotional well-being and self-esteem. Over 50% of youth reporting both date violence and rape also reported attempting suicide. Controlling for race and age, adolescents who have experienced both date violence and rape were more likely to use laxatives (OR: girls = 5.76; boys = 28.22), vomit (OR: girls = 4.74; boys = 21.46), use diet pills (OR: girls = 5.08; boys = 16.33), binge eat (OR: girls = 2.15; boys = 5.80), and have suicidal thoughts or attempts (OR: girls = 5.78; boys = 6.66) than their nonabused peers. These odds were weakened but remained significant after controlling for other abuse by an adult. Furthermore, a greater percentage of girls and boys who reported an abusive dating experience also reported repeat victimization (physical or sexual abuse perpetrated by an adult) when compared to their peers without an abusive dating experience. DISCUSSION: Abusive experiences during dating relationships may disrupt normal developmental processes, including the development of a stable self-concept and integrated body image during adolescence. This disruption manifests itself through thoughts, feelings, and behaviors. Further research should explore effects of adverse adolescent dating experiences.  相似文献   

11.
This study used the monozygotic (MZ) twin difference method to examine whether differences in friends' aggression increased the differences in MZ twins' aggression and depressive symptoms from kindergarten to Grade 1 and whether perceived victimization by the friend played a mediating role in this context. Participants were 223 MZ twin pairs. Results showed that differences in kindergarten friends' aggression significantly predicted an increased difference in MZ twins' aggression from kindergarten (mean age = 6.7 years) to Grade 1 (mean age = 7.5 years) for both boys and girls. Differences in perceived victimization by the friend mediated this association, albeit only in boys. Differences in perceived victimization by the friend also predicted an increase in MZ twins' differences in depressive symptoms. These results support the importance of friendship experiences during early childhood.  相似文献   

12.
Prior research has established that temporary perturbations characterize parent-daughter relations around menarche. This study was designed to determine whether the observed perturbations are indicative of conflictive engagement, operationally defined as sequential reciprocity of interruptions and disagreements, and to examine the affective nature of such behaviors. Sequential analyses were applied to the observed behavior of 111 intact families with firstborn seventh-grade girls (modal age = 12 years old) who participated in a structured family interaction task. Results indicated that conflictive engagement with parents is more frequent shortly after menarche, especially in the mother-daughter dyad. Withdrawal of positive affect also was associated with menarcheal status; in the mother-daughter dyad, interruptions and disagreements were less often responded to with positive affect for the more mature groups. It is suggested that because of the nature of the interpersonal and intrapsychic processes occurring in the family around menarche, conflict may facilitate familial adaptation to pubertal change and make moderate levels of conflict normative in healthy families.  相似文献   

13.
Emotional maltreatment is a common form of child abuse with a powerful negative impact on mental health. The aim of this study was to examine the effect of emotional maltreatment on mental health and mental well-being in a general population of Swedish 12- to 13-year old girls and boys. Data was collected via self-report questionnaires in classroom settings from 1134 students. Emotional maltreatment had significant effects on mental health and mental well-being for both girls and boys. Moreover, there were significant interaction effects between gender and levels of emotional maltreatment. Girls reported decreased mental health and mental well-being at lower degrees of emotional maltreatment compared to boys. Furthermore, girls reported larger decreases in mental health in response to exposure of emotional maltreatment. For internalizing symptoms, mental well-being and psychosomatic symptoms, exposure level of emotional maltreatment seemed to magnify the gender differences. For externalizing symptoms, there were no differences between girls and boys in the group reporting no emotional maltreatment and the increase in externalizing symptoms were of equal magnitude for both genders. Given the impact of emotional maltreatment on mental health in the general population, results from this study implies that a trauma-informed perspective is necessary in understanding gender differences in mental health in early adolescence. Further research is needed in order to understand the underlying processes generating the differences in girls and boys responses to emotional maltreatment.  相似文献   

14.
The purpose of this study was to determine whether timing of puberty is related to spatial ability in adult women, and whether, if so, the relation could be attributed to timing-related differences in hemispheric specialization and/or timing-related differences in personality and spatial activity. 53 female undergraduates were given 2 tests of spatial ability, tests of both right-hemispheric and left-hemispheric specialization using tachistoscopic procedures, several tests assessing masculinity and femininity, and a questionnaire on spatial activity. They were also asked to recall their age at menarche. Later age at menarche was associated with greater right-hemispheric advantage on the dot location task but not with higher spatial ability. Spatial ability in this sample was in fact correlated with greater left-hemispheric advantage on the dot location task, as well as with more balanced hemispheric specialization on the syllable task. It is suggested that variability in findings regarding cognitive correlates of timing of puberty may be related to variability in strategies for approaching tasks. The implications of these data for efforts to explain sex-related differences in spatial ability are discussed.  相似文献   

15.
The barriers to menstrual hygiene management faced by adolescent schoolgirls in low-income countries are gaining interest at practice and policy levels. The challenges include inadequate water, sanitation and disposal facilities for the management of menses with privacy and dignity, and insufficient guidance to help girls feel confident in attending school during menses. The studies described here aimed to examine how menarche impacts the lives of schoolgirls in three low-income countries (Ghana, Cambodia and Ethiopia). The focus included girls’ school participation; their relationship with parents, teachers and peers; their evolving sanitation and hygiene needs; their understanding of cultural issues and taboos around menses; and what education, if any, they received prior to and during puberty. This comparative analysis was aimed at identifying similarities between the three countries that would enable the adaptation to each context of a training book on menstruation issues for girls, which was developed from a previous study conducted in Tanzania. In all three countries, participatory activities were utilised with girls and results were analysed using grounded theory. Findings included: similarities regarding the importance of culture in perpetuating negative attitudes towards menstruation, limited provision of health information and insufficient facilities within schools. Differences were revealed regarding menstrual myths, parent–child dynamics, sources of guidance and student–teacher relations. There is a critical knowledge gap around menstruation and girls’ education in these contexts that must be addressed to ensure that girls experience a positive menarche and can manage menstrual hygiene.  相似文献   

16.
The present study was conducted in Finland and the USSR (Estonia) with two birth cohorts (14 and 17 years old) and their parents. The subjects, 504 in Finland and 329 in Estonia, were drawn from urban and rural areas. 85% of the Estonian and 55% of the Finnish parents returned the questionnaire. The results supported the hypothesis that adolescent drinking is an age-related behaviour aimed at active coping efforts to adopt adult-like behaviour. In both countries abstinence decreased with age, and the use of alcohol was seen as behaviour which became acceptable at an older age than the age when the actual initiation occurred. However, the use of alcohol remained occasional through the ages of 17 to 18. Adolescents’ drinking correlated strongly with their conceptions of the accepted motives for drinking which, in turn, correlated with observations of the parents’ use of alcohol. In Estonia, boys with high self-esteem were most active in adopting customary adult drinking. In Finland, drinking was typical of boys who were active in the use of leisure time, whereas abstinence, was typical of passive users of leisure time. The Finnish adolescents did not make a distinction between moderate and heavy drinking as clearly as the Estonian ones. Traditional sex differences in the use of alcohol still existed in Estonia, but Finnish girls’ drinking did not differ from Finnish or Estonian boys’ drinking. The influences of parental modelling were strongest for Finnish girls. There were few indicators of reactive coping efforts for strains from the environment, but a conflicted home atmosphere was a risk factor of the early onset of alcohol drinking.  相似文献   

17.
A Longitudinal Study of Predictors of Spatial Ability in Adolescent Females   总被引：1，自引：0，他引：1  
This study examined the longitudinal predictability of spatial ability in late-adolescent females by retesting 11-year-old girls studied by Newcombe and Bandura at age 16. Spatial ability at age 16 was predicted longitudinally from masculinity of the ideal self on a scale of intellectually relevant attributes at age 11, wanting to be a boy at age 11, and, negatively, by feminine expressivity at age 11. No timing of puberty or lateralization effects were observed. The findings strengthen evidence that sex-related differences in spatial ability could be experientially determined, and help to focus the search for exactly how this occurs. The findings also cast doubt on the idea that sex-related differences in spatial ability could be caused by sex differences in timing of puberty or lateralization, although other biological mechanisms remain plausible.  相似文献   

18.
This study examined correspondence between timing (onset) and tempo (rate) of sexual maturation prospectively (average ages 11–16 years) measured by gonadal hormones and secondary sex characteristics (Tanner stage) using dual-process models, and associations of these measures with substance use (SU) involvement in boys at age 16 years (N = 534, 77.5% White/22.5% Non-White). All measures of timing were highly associated. Early Tanner stage timing often predicted slower increases in gonadal steroids, but not the reverse; patterns varied by ethnicity. Hormone and Tanner stage measures were similar earlier in development but diverged later in development. In White boys only, early timing of the pubertal rise in testosterone was associated with increased SU involvement, suggesting a physiological rather than psychosocial mechanism of association.  相似文献   

19.
OBJECTIVE: To compare the effectiveness of three different examination methods in their ability to help the examiner detect both acute and non-acute genital injuries in prepubertal and pubertal girls suspected of having been sexually abused. METHODS: Forty-six prepubertal and 74 pubertal girls, whose ages ranged from 4 months to 18 years, were evaluated to determine the relative effectiveness of three different examination methods. RESULTS: All the girls had sustained a recent genital injury from various causes. The mean time between an injury and the first examination was 24h for the prepubertal girls and 27h for the pubertal girls. The three "multimethod" examination approaches used were the supine labial separation method; the supine labial traction technique; and the prone knee-chest position. The supine labial separation method was useful in identifying an injury on the external portion of the genitalia in both groups of girls. Injuries within the vestibule, on the hymenal surface, or in the fossa navicularis required greater separation of the labia. This was accomplished through the use of either the supine labial traction technique or the prone knee-chest position. The prone knee-chest position was the most successful method for identifying hymenal lacerations in both groups of girls. Of the 10 hymenal lacerations detected in the prepubertal girls 20% were identified during the use of the supine labial separation method, 60% with the supine labial traction technique, and 100% with the prone knee-chest position approach. Of the 49 hymenal lacerations detected in the pubertal girls 24% were identified with the supine labial separation method, 65% with the supine labial traction technique, and 90% with the prone knee-chest position approach. The data from this study has shown that the results of a medical examination will vary by the method employed. CONCLUSIONS: While no single technique detected all the injuries, the use of the multimethod examination approach did prove to be a valuable adjunct in the evaluation of both the prepubertal and the pubertal girl's genitalia, particularly in the identification of a hymenal laceration. PRACTICE IMPLICATIONS: This approach uses three different examination methods: the supine labial separation method, the supine labial traction technique, and the prone knee-chest position. According to the results of this study, without the combined use of these three methods a significant number of injuries, particularly hymenal lacerations, could be missed in both the child and the adolescent.  相似文献   

20.
We identified developmental trajectories of depressive symptoms among 674 Indigenous adolescents (Mage = 11.10, SD = 0.83 years) progressing from early to late adolescence. Four depressive symptoms trajectories were identified: (a) sustained low, (b) initially low but increasing, (c) initially high but decreasing, and (d) sustained high levels of depressive symptoms. Trajectory group membership varied as a function of gender, pubertal development, caregiver major depression, and perceived discrimination. Moreover, participants in the different trajectory groups were at differential risk for the development of an alcohol use disorder. These results highlight the benefit of examining the development of depressive symptoms and the unique ways that depressive symptoms develop among North American Indigenous youth as they progress through adolescence.  相似文献   

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