Early Menarche: A Review of Research on Trends in Timing, Racial Differences, Etiology and Psychosocial Consequences

This paper elucidates varying definitions of “early menarche” and reviews evidence in four well-documented areas: (a) A potential trend toward earlier maturation, (b) racial differences in menarcheal timing, (c) etiology of early puberty, and (d) consequences of early puberty. While teachers and physicians perceive menarche as occurring earlier than in the past, mean menarcheal age has remained relatively constant over the past 50 years. Conflicting results concerning racial differences in timing highlight the need for further research to unravel the effects of race and social economic status (SES). Evidence regarding the relative etiological contributions of nutrition, environmental stress, and genetics is evaluated. Maturing earlier than one’s peers has negative consequences for girls, especially when combined with simultaneous stressors. However, the negative psychosocial consequences of early puberty may not last into later adolescence or adulthood. Few studies have investigated early-maturing adolescents’ subjective experience with menarche, particularly those from non-white and non-middle-class backgrounds.This article is based on a paper presented at the 2003 Society for Menstrual Cycle Research Conference in Pittsburgh, PA.     

Early Childhood Care Trends and Associations with Child Health Well-being in China: Evidence from the CHNS 1991 to 2011 Data

It has become increasingly common for young children to be taken care of by multiple caregivers in China after the socio-economic reforms. Complex migration patterns and high female labour force participation have led to children receiving care from various individuals in different contexts. However, little is known about how childcare arrangements are associated with child health well-being. This study examines various early childhood caregivers and their influences on children’s physical health in China. Using data from the China Health and Nutrition Survey (CHNS 1991–2011) with 3,470 children aged 2 to 6, we first identified different types of childcare arrangements in and outside of the household based on who provides the care, where they provide the care, and the intensity of the care. Then we examined the relationship between various childcare arrangements and health outcomes for children. Overall, household members undertook early childhood care tasks in China, with an increase in grandparents as primary caregivers between 1991 and 2011. The proportion of children receiving formal childcare fluctuated around 20% during this period. The findings suggest that: 1) primary caregiver in the household other than parents is not associated with undesirable physical health outcomes; 2) formal childcare outside the household is associated with higher height and lower BMI scores; 3) primary caregivers in the household, particular grandparents, moderate the association between childcare arrangements outside the household and children’s health outcomes. It yields an implication that early childhood care policies incorporating multiple caregivers would benefit children’s well-being in China.

     

Age Trends in Eidetikers

The entire available population (N = 408) of a primary school in Perth, Western Australia, was tested for eideticism using a slightly modified presentation of the Haber and Haber (1964) procedure. Sixteen eidetikers were found in the age range covered (5–13 years). When classified into four age categories (5–6, 7–8, 9–10, 11–13), the number of eidetikers in relation to noneidetikers showed a statistically significant and systematic decline with increasing age. These results are discussed in relation to their possible significance for a theory of eidetic development.     

Trends in Anxiety Assessment

Trends in anxiety assessment were established by examining the methods reported in anxiety-related papers published in three prominent behavior therapy journals from 1970 to 2002. Assessment methods were categorized using Lang's three-system concept of anxiety (P. J. Lang, 1968) as an organizational framework. Analysis of the research methods suggests two primary patterns. First, multisystem assessment declined in the last several years by comparison with previous years whereas the assessment of a single response system (typically self-report) has increased. Second, among anxiety-related papers reporting multimodal assessment, physiological assessment returned to 1970s-era frequency in recent years after an upsurge in the mid-1980s and early 1990s. Some possible interpretations and implications of these trends are discussed.     

认知发展研究趋势的探讨

该文阐明了认知科学、建构主义和新皮亚杰学派对认知发展研究的影响,着重论述了新皮亚杰学派对认知发展研究的新趋势及主要观点,并对这些趋势予以了较为详尽的评述,以期为认知发展心理学家重新审视和思考原有认知发展理论假设的合理性、提出新的假设和新的研究方向有所启示。     

现代逻辑的抽象化趋势——概述抽象代数逻辑的产生和发展

现在的逻辑学已发展为内容丰富、分支众多的学科。随着研究成果的日益丰富,逻辑学向更抽象化的方向发展成为必然,抽象代数逻辑就是这种趋势下产生的一种逻辑形态。要了解这种逻辑的产生,就要从现代逻辑的两个研究方法———对逻辑进行代数化处理和使推理概念形式化或符号化——     

Trends and Progress in Philosophy

This article is in three parts. The first discusses trends in philosophy. The second defends reliance on intuitions in philosophy from some doubts that have recently been raised. The third discusses Philip Kitcher's contention that contemporary analytic philosophy does not have its priorities straight. While the three parts are independent, there is a common theme. Each part defends what is regarded as orthodoxy from attacks. Of course there are other reasonable challenges to philosophical methodology. The article's aim is just to respond to some charges that have been made.     

Seven Important Labor Force Trends

Observations based on data derived from the 1981 Handbook of Labor Statistics bring to the fore some changing realities that Job Service counselors need to accept.     

Trends of the Voter's Mind

Abstract

Casual conversations were recorded as elderly persons routinely walked their dogs through a familiar mobile home park in the United States. Control observations included walks without dogs by owners and non-owners of dogs. All owners talked to and about their dogs. Transcribed conversations indicated that dogs were a primary focus of conversation. A majority of sentences to dogs were imperatives; the owners were instructing the dogs. Dog owners frequently included dogs' names or nicknames in their sentences when they spoke to the dogs and made reference to the dogs' wishes or needs. Speaking to dogs was also associated with frequent repetition of sentences. Passersby talked to the owners about their dogs whether or not the dogs were present. When dog owners spoke with other people, their conversations often concerned activities that were occurring in the present, whereas conversations of non-owners focused on stories about past events. Dog owners reported taking twice as many daily walks as non-owners. Dog owners also reported significantly less dissatisfaction with their social, physical, and emotional states.