The Associations Among Perceived Pubertal Timing, Parental Relations and Self-Perception in Turkish Adolescents

This study is primarily aimed at investigating how pubertal timing is perceived in urban Turkish adolescents in terms of their feelings about maturation, their relationships with their parents, and their self-perception. A total of 697 high-school students (360 girls, 337 boys) between the ages of 14 and 18 (M=16.15, SD=1.08) were included in this study. The findings indicated that most of the adolescents perceived themselves as on-time developers in comparison with their peers. Consistent with widely available research data in the literature regarding the impact of early versus late maturation, girls who mature early and boys who mature late reported more negative feelings about pubertal maturation. In addition, those who matured early reported greater conflict and disagreement with their parents and more negative communication with their fathers than the adolescents who matured on- time. Adolescents who were less satisfied with their physical appearance were more likely to have negative feelings about pubertal maturation. Sex was found to act as a moderator of relationships between global self-worth and feelings about pubertal maturation. In conclusion, this study, conducted with Turkish urban adolescents, suggests that the impact of early versus late maturation differs between girls and boys, which is consistent with widely available data in the literature.     

Pubertal Timing and Adolescent Adjustment and Behavior: Conclusions Vary by Rater

The effects of pubertal timing on adolescent development have been studied since the late 1930s, yet the research has yielded inconsistent findings. One reason for such inconsistency may be the source of the rating. The purpose of this report was to examine whether pubertal timing by self-report (SR), parent report (PR), or physical exam (PE) predicted the same aspects of adjustment and behavior problems. Fifty-two girls, age 9–14 years (M = 12.0 ± 1.6) and 56 boys, age 10–15 years (M = 12.7 ± 1.3) and their parents were enrolled in the longitudinal study. Parents completed the Child Behavior Checklist and adolescents completed the Offer Self-Image Questionnaire. Using regression, later maturing boys and girls had more adjustment and behavior problems than on-time or earlier maturers in cross-sectional analyses. Longitudinally, there were few significant relationships between pubertal timing at the first occasion of measurement and adjustment and behavior problems 1 year later. Overlap in correlates of adjustment and behavior problems across raters was not always found. More significant findings were evident between pubertal timing and adjustment and behavior problems for boys than for girls and more for ratings by PE than by SR or PR. Caution appears in order when drawing conclusions about pubertal timing and adolescent behavior when rater of pubertal development or timing of rating varies across studies. The selection of who rates pubertal development and the timing of the ratings should be based on the underlying theoretical framework guiding the hypotheses.     

Effects of Pubertal Timing on Communication Behaviors and Stress Reactivity in Young Women During Conflict Discussions with their Mothers

Individuation, a process whereby adolescents gain autonomy from their parents while maintaining emotional relatedness, is displayed by characteristic styles of verbal exchanges. Negotiating this developmental transition is often stressful for adolescents and their parents. This study deals with the association between pubertal timing, communication behaviors, and stress reactivity assessed during young females’ conflict discussions with their mothers. A sample of N = 32 girls (age 9–13, T1) was grouped by pubertal timing. Years later (age 17–22, T2) they were followed up and videotapes of daughter–mother conflict discussions were evaluated. Salivary alpha-amylase was used to assess the stress reactivity. Results revealed that young women who had entered puberty early were higher in striving for control and separation in interactions with their mothers, and displayed higher stress levels. These results pointed to less successful individuation in late adolescence/young adulthood compared to on-time and late maturing age mates.

The Value of Waiting in Lawmaking

Political actors and legislative bodies often invoke net present value calculations to support proposed legislative change. This paper explores the idea that adopting a law is like investing in a productive asset to identify possible misleading applications of net present value calculations. Investment involves incurring a present cost in the expectation of future benefits. Legal systems can be regarded as making investment decisions when incurring present lawmaking costs that will generate benefits over time. Lawmaking investments share, in varying degrees, three important attributes with other investment decisions. First, lawmaking costs cannot be recovered if the enacted rules prove to be ineffective or undesirable at a later time. That is, lawmaking investments are partially or completely irreversible. Second, there is often uncertainty over the future benefits of the legislation. Chosen rules may prove ineffective or changes in the social or economic circumstances may render them obsolete over time. Third, like any investment decision, timing is an issue for lawmakers to determine: lawmaking innovation or revision of current rules can be postponed. Often delays in such investment decisions come at a cost, given the forgone benefits of the investment in the immediate future. This paper focuses on the value of waiting in lawmaking, illustrating the interaction among the above factors in identifying the conditions that determine the optimal timing of legal intervention. The basic model is followed by two extensions. In the first extension, we allow for some learning and informational benefit from the immediate implementation of the new law. In a second extension, we allow for political time preference to affect the lawmaking choice.     

从南京大屠杀的发生看日军的战略时机选择——以日方思虑为中心的考察

西安事变和平解决后,日本感于以抗日为主要诉求的中国国家整合取得了成效,有可能导致其侵略利益丧失,因而发动全面侵华战争.在日本看来,南京是当时中国抗日的中心,不占领南京,"推翻"国民政府,就不能"膺惩"中国,于是扩大战争到南京.最终,日军把暴行作为战略手段,企图以此来压服中国,南京大屠杀由此发生.     

News Norms and the Strategic Timing and Content of Candidate Messages

Abstract

In this paper, we ask what sets of factors influence the timing and the content of presidential candidate press releases. Utilizing a unique data set, we examine the influence of internal campaign factors as well as external media factors on campaign information dissemination during the invisible primary season. We find that both types of factors may influence the timing of press releases; as to content, however, media norms are less likely to alter a candidate's general strategic message, which is dictated by his competitive status and national stature.     

Eroding Democracy: Federal Intervention in Russia's Gubernatorial Elections

Under some conditions, electoral politics may undermine democratization, even when the elections themselves adequately meet the usual standards. To illustrate this point, the article examines the dynamics of gubernatorial elections held in the 89 regions that comprise the Russian Federation during the first term of President Vladimir Putin. The analysis considers whether pressure from the federal executive and strategic changes in election timing influenced the results of these elections. The study contends that Putin's experience with gubernatorial elections led him to question their value and, ultimately, to eliminate them. Meanwhile, several of Russia's governors sent clear signals that they did not value free and fair elections. Since governors presiding over Russia's poorest regions were also the ones most likely to be insulated from public accountability, voters saw little value in defending the institution of gubernatorial elections. This helps explain the lack of public outcry following Putin's decision.     

文件上有色指印非纹线特征的应用研究

为了充分地发掘模糊指印形态特征在司法实践中的可用性和实用性,我们利用文件上有色指印的阶段性痕迹--墨迹边缘状态、积墨形态分布“、空白”形态分布及其相互位置关系等非纹线特征,分析研究了不同捺印人以油墨为介质连续捺印的样本指印50组共200枚,结果发现使用非纹线特征能够准确地分辨出同一手指连续捺印的同组指印。本文还对应用指印非纹线特征的各项技术要点进行了讨论,并且列举了该方法用于鉴定实践的三个成功案例。指印非纹线特征的应用不仅改变了对模糊指印只能出“具不具备鉴定条件”的结论模式,而且使适合使用该方法的被检指印形成相对时间的难题得到解决。     

When Are Local Incumbents Held Accountable for Government Performance? Evidence from US School Districts

Do voters hold local officials accountable for government performance? Using over a decade of panel data on school district elections and academic achievement in California, I causally identify the effect of test score changes on school board incumbent re‐election rates and show that incumbents are more likely to win re‐election when test scores improve in their districts—but only in presidential election years. This effect disappears in midterm and off‐years, indicating that election timing might facilitate local government accountability.     

Developmental Markers in Adolescence: Implications for Studies of Pubertal Processes

There is inconsistency in the outcome measures of biological and psychosocial studies using measures of puberty as a predictor. For example, some studies show that maturational timing may have differential influences (positive, negative, or no effect) depending on the specific disorder, dimension of measure, and gender. Other studies have suggested that some effects may be more directly linked to pubertal stage or hormone concentrations rather than timing per se. This study outlines several conceptual and methodological issues that may be relevant to addressing these inconsistencies, in the context of examining data from a study of maturational hormones obtained from a unique longitudinal cohort of 24 girls (age 10.0 ± 1.6 years) and 36 boys (age 10.4 ± 1.6 years) in the early part of puberty, where the developmental trajectory of these hormones were tracked annually in 65% of the sample. We explored the contributions of measures of pubertal growth and sociodemographic factors on hormone concentrations. In brief, it appears that no single measure best captures the maturational processes during puberty and suggests that multiple processes are occurring in parallel. Several conceptual and methodological implications are discussed that may guide investigators in interpreting existing studies of pubertal timing and behavior as well as in conducting future studies.