随机截距潜在转变分析(RI-LTA)——个案自我转变与个案间差异的分离

传统的潜在转变分析属于单水平分析, 但其同样也可以看作二水平分析。Muthén和Asparouhov就以二水平分析的视角在单水平分析框架内提出了随机截距潜在转变分析(RI-LTA), 其中跨时间点产生的自我转变可以看作在水平1进行分析, 跨时间点不变的个案间差异可以看作在水平2进行分析, 使个案的自我转变和个案间的初始差异分离, 避免了高估保留在初始类别的概率。某研究型大学2016级本科生的追踪调查数据被用于演示使用随机截距潜在转变分析的过程。该方法的最大优势是通过引入随机截距避免了高估保留在本类别的转变概率。未来研究可以运用蒙特卡洛模拟研究探究随机截距潜在转变分析模型的适用性, 也可以用多水平分析的思路为灵感, 探究多水平随机截距潜在转变分析在统计软件中的实现。     

Evidence for discrete profiles of children’s physiological activity across three neurobiological system and their transitions over time

The conceptualization of stress‐responsive physiological systems as operating in an integrated manner is evident in several theoretical models of cross‐system functioning. However, limited empirical research has modeled the complexity of multisystem activity. Moreover few studies have explored developmentally regulated changes in multisystem activity during early childhood when plasticity is particularly pronounced. The current study used latent profile analysis (LPA) to evaluate multisystem activity during fall and spring of children's transition to kindergarten in three biological systems: the parasympathetic nervous system (PNS), sympathetic nervous system (SNS), and hypothalamic pituitary adrenal (HPA) axis. Latent transition analysis (LTA) was then used to examine the stability of profile classification across time. Across both timepoints, three distinct profiles of multisystem activity emerged. One profile was characterized by heightened HPA axis activity (HPA Axis Responders), a second profile was characterized by moderate, typically adaptive patterns across the PNS, SNS, and HPA axis (Active Copers/Mobilizers), and a third profile was characterized by heightened baseline activity, particularly in the PNS and SNS (Anticipatory Arousal/ANS Responders). LTA of fall‐to‐spring profile classifications indicated higher probabilities that children remained in the same profile over time compared to probabilities of profile changes, suggesting stability in certain patterns of cross‐system responsivity. Patterns of profile stability and change were associated with socioemotional outcomes at the end of the school year. Findings highlight the utility of LPA and LTA to detect meaningful patterns of complex multisystem physiological activity across three systems and their associations with early adjustment during an important developmental transition.     

Conceptions of the Transition to Adulthood: Perspectives From Adolescence Through Midlife

Conceptions of the transition to adulthood were examined among adolescents (age 13–19, N = 171), emerging adults (age 20–29, N = 179), and young-to-midlife adults (age 30–55, N = 165). The focus was on whether conceptions of the transition to adulthood would be different among young-to-midlife adults compared to the younger age groups. In all age groups, individualistic criteria were the most likely to be considered important markers of the transition to adulthood, specifically accepting responsibility for one's actions, deciding on one's beliefs and values, establishing an equal relationship with parents, and becoming financially independent. However, young-to-midlife adults were less likely than adolescents to consider biological transitions to be important, and more likely than adolescents or emerging adults to view norm compliance (such as avoiding drunk driving) as a necessary part of the transition to adulthood. In all three groups, role transitions (e.g., marriage) ranked lowest in importance.     

Children at Risk: Effects of a Four-Year Head Start Transition Program on Special Education Identification

Children in Head Start are at risk for school learning or behavioral problems. While Head Start has decreased special education placement, there has been little systematic data until recently on identification of children in disability categories following preschool. In this study, two cohorts of 6,162 children across 30 sites were followed through third grade. Approximately half of these children were provided transition assistance from kindergarten through third grade. This included school transition and curricular modifications, parent involvement activities, health screening or referrals, and family social services, all similar to those received in Head Start. They were compared to a similar group of Head Start children who did not receive such services beyond the Head Start experience. Special education eligibility was determined from school records in the spring of third grade. Only 0.89% of children in the transition group were identified in the mental retardation category compared to 1.26% in the non-transition group. In the category of emotional disturbance, these same figures were 1.21% and 1.65% respectively. Both differences were statistically significant, but an opposite effect was found in the category of speech or language impairment. Findings are discussed in relation to differences in disability categories and implications for early identification.     

Adaptation of career goals to self and opportunities in early adolescence

Development of career goals that are adapted to self and opportunities is a central component of adolescent career preparation. The present longitudinal study (conducted throughout the eighth grade with three assessment points) investigated how 330 Swiss adolescents simultaneously adapt career goals to interests, scholastic achievement and environmental opportunities. Results demonstrated that students increasingly adapt their goals to the environment. Mean adaptation to environment related positively to degree of adaption to interests and achievement. Increased adaptation to environment over time related to increased adaptation to achievement but to decreased adaptation to interests. Gender, attended school type and nationality moderated adaptation processes. Structurally disadvantaged students (girls, lower requirements school track, immigrant students) reported more conflict in aligning adaptation to environment with adaptation to interests.     

Parental negotiations of the moral terrain of risk in relation to young people with intellectual disabilities

This paper draws upon parental accounts from a study of the process of transition for a cohort of 28 young people with relatively severe intellectual disabilities who left special schools in 2004 and 2005 in two adjacent English localities. This paper examines how parents negotiate these boundaries and position themselves in relation to risk. A primary concern identified by parents during this transition period focuses on the risk of harm facing these vulnerable young people (whether through accidents or through sexual, emotional, physical or financial abuse) as they move into the adult world. These concerns are juxtaposed with discourses that increasingly promote the possibilities for people with intellectual disabilities to express and follow their own wishes and aspirations. For example, the policy agenda in England and Wales actively endorses the start of adult life as a time of opportunity for young people and promotes the values of independence and choice. In accounting for the management of risk in the young people's lives, we conclude that parents navigate complex boundaries between being seen to be over‐protective and ‘letting go’; between trusting others to act in the young adults' best interests and allowing these young people the autonomy to negotiate risk. Copyright © 2008 John Wiley & Sons, Ltd.     

The Next American Revolution？ Reflections on Gar Alperovitz,What Then Must We Do？

Marx is concerned with theory that not only interprets but also changes the world. A central issue is thus the transition from capitalism to communism, a topic rarely considered by critics of capitalism today. An important exception is Gar Alperovitz, who, although eschewing the word ＂communism,＂ argues that we need ＂a new system＂ and sketches a transition strategy for moving ＂beyond capitalism.＂ This paper elaborates and evaluates this strategy.     

Chest reconstructive surgeries in transmasculine youth: Experience from one pediatric center

Background: For many trans males, having chest reconstruction is a very important part of the transitioning process. Guidelines from WPATH and the Endocrine Society suggest 16 to 18 years old as an acceptable age for this surgical intervention. In clinical practice, the decision depends on factors such as a person's desires, insurance coverage, and availability of local surgical experts. We present data about chest reconstructive surgeries in transgender youth from a Pediatric Gender Management (GeM) clinic.

Methods: For this retrospective, observational study, data were collected from GeM clinic patients seen from 10/1/2011 to 1/31/2017. All subjects consented or assented to being included in an IRB-approved clinical database.

Results: Of 210 patients from our clinic, 167 consented to being added to an institutional review board–approved database and followed prospectively. The average age at the initial visit was 15.2 years (range, 4.7–20.9). Among consenting subjects, 55 were trans females, 108 were trans males, and four identified as nonbinary. Fourteen subjects had chest reconstruction with the mean age being 17.2 years (range, 13.4–19.7); three subjects were under age 16. For five subjects, including the youngest one, insurance paid for the procedure. All participants but one were receiving testosterone treatment. Per the surgeons' preferences, testosterone was usually not temporarily stopped prior to the procedure. Six subjects had the procedure done locally; others sought surgical care out of the town, state, or country. All subjects were very satisfied with the aesthetics of the surgical outcome. The self-reported complication rate was low. Many more GeM clinic patients wish to have breast/chest surgery but lack of insurance coverage makes the surgery cost prohibitive.

Conclusion: For many trans males, chest reconstructive surgery is an integral part of the transition process. Patients' age at the time of surgical procedure varies greatly; some have chest surgery before age 16. In the United States, chest reconstruction surgery is usually not covered by insurance. Therefore, many patients seeking surgical care are forced to pay out of pocket.     

Adolescent psychopathy features: 6-year temporal stability and the prediction of externalizing symptoms during the transition to adulthood

This study investigated the 6-year stability and predictive validity of adolescent psychopathy features during the transition to young adulthood. It represents one of the longest outcome studies of youth psychopathy to date, and therefore addresses a primary criticism of the research area (i.e., lack of demonstrated associations between child and adult psychopathy features). Recruited participants were 475 males enrolled in the Minnesota Twin and Family Study who had completed a research-based measure of psychopathy features consisting of separate emotional detachment (or affective) and antisocial tendencies (or behavioral) subscales. These psychopathy features and various externalizing symptoms (i.e., conduct problems, impulsivity, and substance use disorder) were assessed through rating scales and structured diagnostic interview at an intake assessment (ages 16-18) and 6-year follow-up. Consistent with prediction, adolescent psychopathy features displayed moderate stability across the transition from adolescence to adulthood [intraclass correlation coefficients (ICCs) = 0.40-0.41]. The antisocial tendencies subscale was uniquely related to most externalizing symptoms both in adolescence and in adulthood, whereas the emotional detachment subscale showed appropriate discriminant validity in its lack of association with externalizing symptoms. These findings suggest that psychopathy features are relatively stable from adolescence to adulthood and provide possible insights into the development and maintenance of externalizing difficulties during the adult transition.     

社交电商中的社交-消费转换机制

社交情境和消费情境之间可以相互转换是社交电商的重要特征, 然而这种相互转换在现有社交电商采纳行为研究中却没有得到应有的重视。社交-消费转换概念的提出很好地弥补了上述研究不足。社交-消费转换是指用户从社交情境到消费情境的转换过程。基于边界理论, 从社群和用户两方面系统分析社交-消费转换的影响因素与促进机制, 有望构建体现社交电商专属特性的新理论, 帮助人们更加完整地理解社交电商采纳行为, 并为促进社交-消费转换提供切实可行的实践建议。研究内容具体包括以下4个方面：(1)社交电商中社交-消费转换的内涵与外延; (2)社群边界整合供给对整合型社交边界与社交-消费转换的影响; (3)用户边界分割偏好对整合型社交边界与社交-消费转换的影响; (4)社群边界定制氛围对整合型社交边界与社交-消费转换关系的调节作用。