Developmental patterns in body esteem from late childhood to young adulthood: A growth curve analysis

This study examines the long-term development of different domains of body esteem (BE), the most salient domain of adolescents' global self-esteem. The 11-year longitudinal study of Swedish youths, covering ages 10–21, showed that BE undergoes significant change from late childhood to young adulthood, with growth curve models revealing different developmental paths between domains and across gender. For girls, general appearance esteem and weight esteem decreased in the early adolescent phase and then stabilized. For boys, similar patterns were evident, but weight esteem was subject to change also in late adolescence. The third BE domain, appearance-evaluations ascribed to others, displayed a distinct developmental trajectory. This was the only domain where no gender differences were noted in terms of mean levels. It was also the only domain that demonstrated positive increases over time. Findings from the present long-term study contribute to a more coherent picture of the development of BE from late childhood and into young adulthood.     

Categorization behaviour in adults,adolescents, and attention-deficit/hyperactivity disorder adolescents: A comparative investigation

Although significant progress has been made with respect to our understanding of categorization and concept learning behaviour in adults, much less is known about how this key capacity plays out with respect to more restrictive populations. This is unfortunate because much may be revealed about the nature of concept learning by examining the limits exhibited by special populations. With this tenet in mind, in what follows, we investigated key aspects of concept learning in terms of the unexplored comparative performance of three populations—adults, adolescents, and adolescents with attention-deficit/hyperactivity disorder (ADHD). To do so, we employed a novel parainformative experimental task involving categorical stimuli with four objects defined over three dimensions. The learning difficulty ordering for these types of three-dimensional stimuli has proven robust and has been replicated by several researchers. Indeed, in our experiment, we observed the same concept learning ordering in adults and adolescents, but not in ADHD adolescents: For example, the latter group showed greatly impaired categorization performance on stimuli characterized by an “exclusive-or” rule. However, categorization performance on such type of stimuli indicated good reliability in discriminating between adolescents with and without ADHD (receiver-operating characteristic, ROC?=?.82). We accurately predicted and accounted for these results using generalized invariance structure theory (GIST; Vigo, 2013. The GIST of concepts. Cognition, 129, 138–162), which posits that organisms detect invariance patterns in stimuli that are necessary precursors to concept formation.     

Governance Barriers to Sustainability

Humanity and water represent an intersection of two natural cycles: the human economy and the earth's hydrological system. Although water is vital for human survival and growth, the point where human endeavor intersects is the most variable and uncertain in the hydrological system. Significant spatial and temporal variation of evaporation and rainfall has led to a number of responses aimed at increasing certainty of access to water. However, many of the world's civilizations can attest that the very act of reducing water uncertainty by technical means (capture, storage, and irrigation) has ultimately led to greater uncertainty and civilization failure. This article explores the concept of living with water as a complex entity, inseparably connected with all three levels of existential complexity—individual, social, and ecological—rather than as a commodity, which has led to our current uncertain status.     

Historical Perspectives on Global Ecology

A historical perspective can shed light on the dilemmas and dimensions of current ecological predicaments. Consideration of long-term trends in economic, demographic, and energy history show just how peculiar, disruptive, liberating, and unsustainable modern times have been. The current era of ecological tumult derives its impetus from many sources, not least the near-stasis in ideas and politics. It is the big ideas, like nationalism, communism, or the premium placed on economic growth, rather than explicitly environmental ideas, that most affected environmental policy and outcomes in the 20th century, and will likely continue to do so in the 21st.     

The effects of classroom teaching on students' self-efficacy for personal development

The personal development of students is an essential component of school guidance and counselling programmes, but no published research on guidance and counselling has investigated the effects of regular classroom teaching on students' self-efficacy for personal development. In this study, questionnaire items were constructed to measure classroom teaching, student self-efficacy for personal development and student use of deep learning strategies. Data were collected from 16,208 secondary school students in Hong Kong. Using structural equation modelling, regular classroom teaching was found to have a direct effect on personal development self-efficacy as well as an indirect effect through student use of deep learning strategies. Implications of these findings for implementing a whole-school approach to guidance and counselling are discussed.     

Electron spin resonance of hydrogenated amorphous silicon-carbon alloy films prepared by magnetron sputtering

Abstract

New electron spin resonance (ESR) lines with g¹ = 2·0017 and g₂ and g₃ = 2·0006 have been found in the ESR spectra of as-deposited a-Si_1–x C_x:H films prepared by magnetron sputtering of silicon in the gas mixtures of methane and argon. Similarities between the observed spectra and those for the E′ centre in glassy SiO₂ are discussed.     

A novel study: Forgetting curves and the reminiscence bump

This study examined the forgetting curves for information read in a novel. People read a 10-chapter novel where each chapter covered an approximately 10-year period in the life of the protagonist. After reading the entire novel, participants completed various memory tests in which they summarised the novel, provided associated information from cues, and answered specific questions. Performance was plotted as the amount of information or the accuracy of question answering for each chapter. All of the memory tests revealed similar patterns: (a) better performance for early information (a primacy effect), (b) a bump in performance when the protagonist was approximately 20 years old, and (c) a smaller bump in performance when the protagonist began a career later in life. These results are considered in the context of theories of forgetting, autobiographical memory, and situation models.     

A criterion for determining the optimum value of twist in the topological model

In previous works, in which the topological model has been applied to martensitic phase transformations, the value of twist angle ω was determined based on the habit plane-(HP) matching method, where the physical realization of the so-predicted interfacial defect networks may require reorientations of defect line directions by short-range diffusion, though no long-range diffusion was needed. In the present work, a novel criterion for determining the optimum value of twist is proposed so that the predicted interface defects are not only able to fulfil the function of fully accommodating the coherency strains arising on the terrace plane, but also capable of reaching the required position at the HP without long- or short-range diffusions. A numerical analysis for an Fe–20Ni–5Mn alloy is demonstrated based on the newly proposed criterion, and the predictions so obtained are in good agreement with the results provided by the phenomenological theory and experimental measurements.     

腹腔镜全子宫切除术学习曲线探讨

为探讨腹腔镜下全子宫切除术学习曲线,收集我院自2011年6月至2012年6月由同一组医师连续开展最初50例腹腔镜下全子宫切除术病例,以每10例为一个手术阶段,分析记录其平均手术时间、出血量、并发症情况等.结果显示成功施行腹腔镜全子宫切除术50例,各组病例在年龄、BMI、既往有无腹部手术史等一般情况比较无明显差异.不同阶段术中出血量、手术时间比较差异有统计学意义(P＜0.05);进一步两两比较结果显示,第1阶段与第3、4、5阶段术中出血量比较差异有统计学意义,第2阶段与第3、4、5阶段术中出血量比较差异有统计学意义(P＜0.05),其余各阶段术中出血量无明显差异(P＞0.05).第1阶段与第2、3、4、5阶段手术时间比较差异有统计学意义(P＜0.05).其余各阶段手术时间比较无明显差异(P＞0.05).由此推断腹腔镜下全子宫切除术学习曲线大约为10例～20例,即可达到较熟练水平和稳定程度.     

Associations between personality traits and psychological well-being across time in middle adulthood

Associations of personality traits with psychological well-being (PWB) were analyzed across ages 33–50 as part of an ongoing Finnish longitudinal study (initial N = 369). Bivariate latent growth curve analyses indicated that a low initial level of neuroticism (.75) and high extraversion (.55) correlated strongly with a high level of PWB. Moreover, a high level of conscientiousness, openness, and agreeableness also correlated significantly with PWB. The change factor was significant only for openness: the higher the initial level of PWB, the higher the increase in openness from age 33–50. In comparison with emotional well-being, indicated by general life satisfaction, the associations of the personality traits with PWB were significantly stronger for neuroticism, extraversion, and openness.