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PubMed1985

Adolescent development in males with Down syndrome.

We investigated growth features, development of primary and secondary sex characteristics, and specified pituitary and testicular hormone levels in 46 male adolescents and young adults with Down syndrome. Their mean height age was significantly less than and their mean bone age was slightly more than their chronological age. The subjects' secondary sex characteristics followed the same developmental pattern noted in youngsters without Down syndrome. Penile length and circumference and testicular volume of our patients with Down syndrome were not statistically different from those of normal adolescents. Follicle-stimulating hormone, luteinizing hormone, and testosterone levels in our study population were similar to those reported for normal adolescents during sexual maturation.

Adolescent↗
PubMed2001

[Female victimization in the context of dating violence in adolescence: development of an instrument (VIFFA)].

The aim is to report on the development and preliminary validation of an instrument, VIFFA (Violence faite aux Filles dans les Fréquentations à l'Adolescence), on female victimization in the context of dating violence in adolescence. Objectives are twofold: to document the psychometric qualities of this self-report and to propose an instrument adapted to the context of young teens. The instrument refers to concepts of physical, emotional, and sexual abuse. Questioning in two phases is used to achieve proper understanding of the concept studied and to help select the partner to whom they refer in the second detailed phase. Girls were questioned on violence sustained and boys on violence inflicted. The total sample included 331 boys and 377 girls; their mean age was 14.6 years. A social desirability questionnaire was used to evaluate discriminant validity and the results indicate that the adolescents' answers were not distorted by social desirability. The factorial analyses resulted in 4 slightly different factors for girls and boys. With regard to the girls (violence sustained), the factors included Verbal and Emotional Abuse, Physical Abuse, Control through Jealousy and Sexual Abuse. With the boys (violence inflicted), the factors were Psychological Abuse, Jealousy and Sexual Abuse, Severe Physical Abuse and Minor Physical Abuse. Validation studies indicate that the instrument has adequate psychometric qualities and is adapted to the context of adolescence. An innovative aspect is the place given to items concerning jealousy.

Adolescent↗
PubMed2001

Sibling, peer, neighbor, and schoolmate correlations as indicators of the importance of context for adolescent development.

We use nationally representative data to calculate correlations in achievement and delinquency between genetically differentiated siblings within a family, between peers as defined by adolescents' "best friend" nominations, between schoolmates living in the same neighborhood, and between grademates within a school. We find the largest correlations between siblings, especially identical twins. Grademate and neighbor correlations are small. Peer-based correlations are considerably larger than grademate and neighbor correlations but not larger than most sibling correlations. The data suggest that family-based factors are several times more powerful than neighborhood and school contexts in affecting adolescents' achievement and behavior.

Adolescent↗
PubMed1996

Self-esteem and mental health in early adolescence: development and gender differences

A longitudinal study of a general population (n=219; M age: 12, 13 and 14), was carried out between 1990 and 1993 over 3 years in Lausanne (Switzerland). Several questionnaires, validated in French, were used: Perceived Competence Scale, Social Support Appraisal and a questionnaire on mental health developed in our research Unit. We attempted to answer the following questions: Is there a global change in self-esteem during early adolescence? If so, does the way in which the young person perceives himself vary according to the social and relational environment? What are the differences between boys and girls in the development of self-esteem? What is the relation between self-esteem and mental health?As to the specific differences according to gender, results show that girls tend to have a poorer self-esteem than boys, whatever the domains taken into consideration. Differences are more significant with reference to appearance and athletic performance. As far as the development of self-esteem is concerned, there is no major change, notably when considering global perception. Results of a factor analysis underscore the fact that girls' self-esteem is more global and less differentiated by domain while boys separate the scholastic and behavioral part of their experience from the social. Global self-esteem has more influence on the level of depressive mood in girls than in boys.

Journal Article↗
PubMed2003

The stressful life events schedule for children and adolescents: development and validation.

The development and psychometric properties of the Stressful Life Events Schedule (SLES), an interview instrument to assess stressors in children and adolescents, are described. Children (< or =12 years) and adolescents (>12 years) with psychopathology (n=30) and non-psychiatric controls (n=30) were interviewed with the SLES about the occurrence of stressful life events during the prior year. To examine concurrent validity of the SLES, all subjects also completed the self-report Life Events Checklist (LEC) and half the sample completed the Life Events and Difficulties Schedule (LEDS). To examine informant validity, the parent/guardian also reported on stressful life events occurring to their child during the year prior to interview. Test-retest reliability of the SLES was examined by re-assessing all children approximately one week after the initial interview. Subjects rated subjectively how stressful an event was on a 4-point scale. Additionally, panel ratings of objective stress and behavior-dependence/independence were made on 4-point scales. The SLES was found to have substantial inter-rater consensus reliability for objective threat (kappa=0.67) and almost perfect reliability for event behavior-dependence/independence (kappa=0.84). Similarly, the test-retest reliability of the SLES was also found to be substantial at the level of specific event comparisons (kappa=0.68). The SLES discriminated between children with and without psychopathology on all measures of stressful life events. Total stressful life events assessed with the SLES concurred well with those assessed by the LEC (ICC=0.83) and the LEDS (kappa=0.77) although, as expected, examination of specific events showed much smaller overlap between the SLES and the LEC (kappa=0.26). Child-parent agreement for the occurrence of severe events was substantial (kappa=0.73) but tended to be only moderate when all events were examined (kappa=0.48). The results of this study indicate that the SLES has good psychometric properties. The SLES is a useful, cost-effective tool for assessing stressful life events in children and adolescents.

Adolescent↗
PubMed2003

Oedipal shame, rejection, and adolescent development.

The definition of oedipal shame, dramatized in Sophocles' tragedy, is the painful affect resulting from accepting the reality of one's origins. A clinical example focusing on shame arising from adoption links oedipal shame to the theme of rejection. Furthermore, in adolescence the revival of the oedipal conflict may reactivate oedipal shame in which unconscious idealized fantasies of personal perfection and the object carried over from childhood have to be renegotiated. This process, illustrated by two clinical vignettes, may reveal entrenched masochistic defenses. An examination of a final scene from a film underscores the significance of oedipal shame in clinical practice.

Adolescent↗
PubMed2006

Neural substrates of choice selection in adults and adolescents: development of the ventrolateral prefrontal and anterior cingulate cortices.

A heightened propensity for risk-taking and poor decision-making underlies the peak morbidity and mortality rates reported during adolescence. Delayed maturation of cortical structures during the adolescent years has been proposed as a possible explanation for this observation. Here, we test the hypothesis of adolescent delayed maturation by using fMRI during a monetary decision-making task that directly examines risk-taking behavior during choice selection. Orbitofrontal/ventrolateral prefrontal cortex (OFC/VLPFC) and dorsal anterior cingulate cortex (ACC) were examined selectively since both have been implicated in reward-related processes, cognitive control, and resolution of conflicting decisions. Group comparisons revealed greater activation in the OFC/VLPFC (BA 47) and dorsal ACC (BA 32) in adults than adolescents when making risky selections. Furthermore, reduced activity in these areas correlated with greater risk-taking performance in adolescents and in the combined group. Consistent with predictions, these results suggest that adolescents engage prefrontal regulatory structures to a lesser extent than adults when making risky economic choices.

Adolescent↗
PubMedDate not supplied

The intersection of adolescent development and intensive intervention: age-related psychosocial correlates of treatment regimens in the diabetes control and complication trial.

OBJECTIVE: To provide evidence relevant to developmentally sensitive intervention and prevention of adolescents' psychosocial distress associated with treatment of type 1 diabetes. METHODS: We used self-reports on the Diabetes Quality of Life and SCL-90-R inventories administered at baseline, 1, and 3 years following adolescents' (n = 224) entry into the Diabetes Control and Complications Trial. RESULTS: Initiation of intensive treatment in early adolescence was associated with increasing school dissatisfaction; initiation in later adolescence resulted in marginal elevations in psychological distress. CONCLUSIONS: Age at entry moderates impact of intensive treatment on reported psychosocial distress. Intervention and prevention efforts sensitive to the interaction of developmental tasks with health treatment goals may optimize the well-being of adolescents with type 1 diabetes.

Adolescent↗
PubMed1993

Development during adolescence. The impact of stage-environment fit on young adolescents' experiences in schools and in families.

Although most individuals pass through adolescence without excessively high levels of "storm and stress," many do experience difficulty. Why? Is there something unique about this developmental period that puts adolescents at risk for difficulty? This article focuses on this question and advances the hypothesis that some of the negative psychological changes associated with adolescent development result from a mismatch between the needs of developing adolescents and the opportunities afforded them by their social environments. It provides examples of how this mismatch develops in the school and in the home and how it is linked to negative age-related changes in early adolescents' motivation and self-perceptions. Ways in which more developmentally appropriate social environments can be created are discussed.

Adolescent↗
PubMedDate not supplied

Male and female correlations for taster (P.T.C.) phenotypes and rate of adolescent development.

Growth and development from infancy to age 18 years in tasters and non-tasters of phenylthiocarbamide (P.T.C.) were studied in 50 female and 44 male subjects. Taster girls reached all indices of maturation an average of 3.8 months earlier than non-taster girls. The reverse was true for boys, non-tasters maturing on average 6.2 months earlier than tasters. For both sexes, there was a significant correlation between an overall Maturity Index and P.T.C. sensitivity, positive for girls and negative for boys. Thirty-two of the females and 20 of the males could be classified according to P.T.C. genotype. For these, the onset, midpoint, and end of the pubertal growth spurt was estimated. Heterozygotes reached these points at times intermediate to homozygotes. Taster females preceded non-taster females and non-taster males preceded taster males by about 6 months. The finding of reversed associations between P.T.C. phenotype and maturation in males and females implies that factors underlying the P.T.C. polymorphism may not be confined to mediation through thyroid metabolism, but may also involve other complex pathways of the hypothalamic-pituitary-gonadal axis, particularly those of the sex hormones. The data were examined for evidence of whether or not the findings could be related to a means of maintaining the P.T.C. polymorphism. A significant negative assortative mating pattern was found. This accords with reports from the literature indicating personality differences between early and late maturers and a tendency for spouses to have similar personality characteristics. However, disassortative mating alone could not produce a stable equilibrium. A hypothesis for the maintenance of the P.T.C. polymorphism is developed on the assumption that the timing of puberty is related to reproductive fitness and subject to balancing selection. Heterozygotes for P.T.C. would be at an advantage because they have intermediate maturation times. In this small sample, P.T.C. heterozygotes were also found to produce more offspring than homozygotes.

Adolescent↗
PubMed1996

Hyperactivity and conduct problems as risk factors for adolescent development.

OBJECTIVE: To clarify the developmental risk associated with hyperactive behavior, especially the relationship between hyperactive and conduct problems, in a longitudinal epidemiological design. METHOD: A follow-up study of children who were identified, by parent and teacher ratings in a large community survey of 6- and 7-year-olds, as showing pervasive hyperactivity or conduct problems or the comorbid mixture of both problems or neither problem. They were later investigated, at the age of 16 to 18 years, with detailed interview techniques as well as parental and self-report ratings and cognitive tests. RESULTS: Hyperactivity was a risk factor for later development, even allowing for the coexistence of conduct problems. Its sequelae included a high likelihood of psychiatric diagnosis, persisting hyperactivity, violence and other antisocial behaviors, and social and peer problems. CONCLUSIONS: The results suggested a developmental pathway through which hyperactivity raised the likelihood of impaired social adjustment, including the development of psychiatric disorders, independently of the existence of conduct problems.

Adolescent↗
PubMed1995

Proof construction: adolescent development from inductive to deductive problem-solving strategies.

Inductive and deductive approaches to the construction of problem-solving proofs were examined using a task that requires the discovery of a geometrical figure hidden behind a series of covers. It was proposed that during adolescence, with the acquisition of a formal reasoning competence (as measured by Overton's [1990] version of Wason's selection task), there would be a transition from inductive to deductive proof construction strategies. One hundred adolescents were assessed on both the problem-solving proof task and the reasoning competence is associated with taking a deductive approach to proof construction. Formal reasoners tend to construct a proof based on the use of a falsification strategy as demonstrated by their search for disconfirming instances. A nonformal level of competence on the other hand is associated with inductive approaches. In this situation nonformal subjects tend to employ a verification strategy as demonstrated by the generation of redundant information. Results support the hypothesis that there is a cognitive developmental progression from an inductive approach to the construction of proofs to a deductive approach.

Adolescent↗